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5TM

TABLE OF CONTENTS

1. Introduction .............................................................................................. 1

2. Operation ...................................................................................................2

2.1 Installation ................................................................................................2

2.2 Removing the Sensor .................................................................................4

2.3 Connecting .................................................................................................4

2.3.1 Connect to METER Data Logger ........................................................ 5

2.3.2 Connect to a Non-METER Data Logger ............................................. 5

2.4 Communication .........................................................................................6

3. System .........................................................................................................7

3.1 Specifications ............................................................................................7

3.2 About 5TM................................................................................................ 10

3.3 Theory ...................................................................................................... 10

3.3.1 Volumetric Water Content .............................................................. 10

3.3.2 Temperature .................................................................................. 11

4. Service ....................................................................................................... 12

4.1 Calibration ............................................................................................... 12

4.1.1 Dielectric Permittivity .................................................................... 12

4.1.2 Mineral Soil Calibration ................................................................. 12

4.1.3 Calibration in Nonsoil Media ..........................................................13

4.2 Troubleshooting ....................................................................................... 13

4.3 Customer Support....................................................................................14

4.4 Terms and Conditions .............................................................................. 15

13441-01

4.9.2018

5TE

References .................................................................................................... 17

Index .................................................................................................................18

iii

5TE

1. INTRODUCTION

Thank you for choosing the ECH2O 5TM Volumetric Water Content (VWC) and Temperature

sensor from METERGroup.

This manual guides the customer through the sensor features and describes how to use the

sensor successfully. METER hopes the contents of this manual are useful in understanding

the instrument and maximizing its benefit.

Prior to use, verify the 5TM arrived in good condition.

OPERATION

2. OPERATION

Please read all instructions before operating the 5TM to ensure it performs to its full

potential.

PRECAUTIONS

METER sensors are built to the highest standards, but misuse, improper protection, or

improper installation may damage the sensor and possibly void the manufacturer’s warranty.

Before integrating 5TM into a system, make sure to follow the recommended installation

instructions and have the proper protections in place to safeguard sensors from damage.

2.1 INSTALLATION

When selecting a site for installation, remember that the soil adjacent to the sensor surface

has the strongest influence on the sensor reading and that the sensor measures the VWC

of the soil. Therefore, any air gaps or excessive soil compaction around the sensor and in

between the sensor prongs can profoundly influence the readings.

• If installing sensors in a lightning-prone area with a grounded data logger, please read

Lightning surge and grounding practices.

• Test the sensors with the data logging device and software before going to the field.

Do not install the sensor adjacent to large metal objects such as metal poles or stakes. This

can attenuate the sensor's electromagnetic field and adversely affect readings. In addition,

the 5TM sensor should not be installed within 5 cm of the soil surface, or the sensing volume

of the electromagnetic field can extend out of the soil and reduce accuracy.

Because the 5TM has gaps between its prongs, it is also important to consider the particle

size of the medium. It is possible to get sticks, bark, roots or other material stuck between

the sensor prongs, which will adversely affect readings. Finally, be careful when inserting the

sensors into dense soil, as the prongs can break if excessive sideways force is used when

pushing them in.

When installing the 5TM, it is imperative to maximize contact between the sensor and soil.

The sensor needs to be completely covered by soil (Figure1).

5TE

ERROR

TEST

(–)

(+)

(–)

(+)

(–)

(+)

(–)

(+)

(–)

P1 P2 P3 P4 P5 P6

Figure1 Example of 5TE proper installation

For most accurate results, the sensor should be inserted into undisturbed soil. There are two

basic methods to accomplish a high-quality installation.

With either of these methods, the sensor may still be difficult to insert into extremely

compact or dry soil.

NOTE: Never pound the sensor into the soil! If there is difficulty inserting the sensor, loosen or wet the soil. This will

result in inaccurate VWC measurements until the water added during installing redistributes into the surrounding soil

METHOD 1. HORIZONTAL INSTALLATION

1. Excavate a hole or trench a few centimeters deeper than the depth at which the sensor

is to be installed.

2. At the installation depth, shave off some soil from the vertical soil face exposing

undisturbed soil.

3. Insert the sensor into the undisturbed soil face until the entire sensor is inserted. The tip

of each prong has been sharpened to make it easier to push the sensor into the soil. Be

careful with the sharp tips!

4. Backﬁll the trench taking care to pack the soil back to natural bulk density around the

sensor body of the 5TM.

METHOD 2. VERTICAL INSTALLATION

1. Auger a 3-in hole to the depth at which the sensor is to be installed.

2. Insert the sensor into the undisturbed soil at the bottom of the auger hole using a hand

or any other implement that will guide the sensor into the soil at the bottom of the hole.

Many people have used a simple piece of PVC pipe with a notch cut in the end for the

sensor to sit in, with the sensor cable routed inside the pipe.

3. After inserting the sensor, remove the installation device and backﬁll the hole taking

care to pack the soil back to natural bulk density while not damaging the black

overmolding of the sensor and the sensor cable in the process.

OPERATION

View a visual demonstration on proper installation of the sensor in How to install soil

moisture sensors.

The sensor can be oriented in any direction. However, orienting the flat side perpendicular

to the surface of the soil will minimize effects on downward water movement. The sensor

measures the average VWC along its length, so a vertical installation will integrate VWC over

a 10-cm depth while a horizontal orientation will measure VWC at a more discrete depth.

This problem occurs regardless of which logging system is being used if the ground wires

are connected at all times. If sensors must be close together (e.g., column experiments),

consider a multiplexing option that would isolate the ground wires.

If installing sensors vertically at short depth intervals, do not bury them directly over the top

of each other. Although at times the vertical distance may be less than 20 cm, the sensors

can be staggered horizontally so they are not directly above each other, thus meeting the

distance requirement.

2.2 REMOVING THE SENSOR

When removing the sensor from the soil, do not pull it out of the soil by the cable! Doing so

may break internal connections and make the sensor unusable.

2.3 CONNECTING

The 5TM works most efficiently with METER ZENTRA, EM60, or Em50 data loggers, and it

can also be used with other data loggers, such as those from Campbell Scientific, Inc.

5TM sensors require an excitation voltage in the range of 3 to 15 VDC.

The 5TM sensors come with a 3.5-mm stereo plug connector (Figure2) to facilitate easy

connection with METER loggers. 5TM sensors may be ordered with stripped and tinned

wires to facilitate connecting to some third-party loggers (Section2.3.2).

Ground

Data

Power

Figure2 Stereo plug connector

The 5TM sensor comes standard with a 5-m cable. It may be purchased with custom cable

lengths for an additional fee (on a per-meter basis). This option eliminates the need for splicing

the cable (a possible failure point). However, the maximum recommended length is 75 m.

5TE

2.3.1 CONNECT TO METER DATA LOGGER

The 5TM sensor works seamlessly with METER ZENTRA, EM60, or Em50 data loggers.

Check the METER download webpage for the most recent data logger firmware. Logger

configuration may be done using either ZENTRA Utility (desktop and mobile application) or

ZENTRA Cloud (web-based application for cell-enabled ZENTRA data loggers).

1. Plug the 3.5-mm stereo plug connector into one of the sensor ports on the logger.

2. Using the appropriate software application, conﬁgure the chosen logger port for 5TM.

3. Set the measurement interval.

2.3.2 CONNECT TO A NONMETER DATA LOGGER

The 5TM sensor can be used with non-METER (third-party) data loggers. Refer to the third-

party logger manual for details on logger communications, power supply, and ground ports.

5TM sensors can be ordered with stripped and tinned (pigtail) connecting wires for use with

screw terminals. Connect the 5TM wires to the data logger as illustrated in Figure3 and

Figure4, with the power supply wire (brown) connected to the excitation, the digital out wire

(orange) to a digital input, and the bare ground wire to ground.

Ground (bare)

Data (orange)

Power (brown)

Figure3 Pigtail wiring

NOTE: Some 5TM sensors may have the older Decagon wiring scheme where the power supply is white, the digital out

is red, and the bare wire is ground.

Switched

3.6–15 VDC

Digital

Data Logger

Data

(orange)

Ground

(bare)

Power

(brown)

Figure4 Wiring diagram

NOTE: The acceptable range of excitation voltages is from 3 to 15 VDC. To read 5TM sensors with Campbell Scientific

data loggers, power the sensor from a switched 12-V port or a 12-V port if using a multiplexer.

If the 5TM cable has a standard 3.5-mm stereo plug connector and will be connected to a

non-METER data logger, please use one of the following two options.

OPERATION

Option 1

1. Clip off the 3.5-mm stereo plug connector on the sensor cable.

2. Strip and tin the wires.

3. Wire it directly into the data logger.

This option has the advantage of creating a direct connection with no chance of the sensor

becoming unplugged. However, it then cannot be easily used in the future with a METER

readout unit or data logger.

Option 2

Obtain an adapter cable from METER.

The adapter cable has a connector for the female stereo plug connector on one end and

three wires (or pigtail adapter) for connection to a data logger on the other end. The stripped

and tinned adapter cable wires have the same termination as seen in Figure4: the brown

wire is excitation, the orange is output, and the bare wire is ground.

NOTE: Secure the stereo plug connector to the pigtail adapter connections to ensure the sensor does not become

disconnected during use.

Because 5TM sensors use digital communication, they require special considerations

when connecting to an SDI-12 data logger. Read SDI-12 example programs to view sample

Campbell Scientific programs.

2.4 COMMUNICATION

The 5TM sensor communicates using two different methods, DDI serial and SDI-12. Please

see the 5TM Integrator Guide for detailed instructions.

5TE

3. SYSTEM

This section describes the 5TM sensor.

3.1 SPECIFICATIONS

MEASUREMENT SPECIFICATIONS

Volumetric Water Content (VWC)

Range

Mineral soil

calibration

0.0–1.0 m3/m3

Soilless media

calibration

0.0–1.0 m3/m3

Apparent dielectric

permittivity (εa)

1 (air) to 80 (water)

Resolution 0.0008 m3/m3 from 0%–50% VWC

Accuracy

Generic calibration ± 0.03 m3/m3 typical

Medium-speciﬁc

calibration

±0.02 m3/m3

Apparent dielectric

permittivity (εa)

1–40 (soil range), ±1 εa (unitless)

40–80, 15% measurement

Temperature

Range –40 to +60 °C

Resolution 0.1 °C

Accuracy ±1 °C

COMMUNICATION SPECIFICATIONS

Output

DDI serial or SDI-12 communication protocol

Data Logger Compatibility

Data acquisition systems capable of 3.6- to 15.0-VDC power and serial or

SDI-12communication

SYSTEM

PHYSICAL SPECIFICATIONS

Dimensions

Length 10.9 cm (4.3 in)

Width 3.4 cm (1.3 in)

Height 1.0 cm (0.4 in)

Prong Length

5.0 cm (1.9 in)

Operating Temperature Range

Minimum –40 °C

Typical NA

Maximum +60 °C

NOTE: Sensors may be used at higher temperatures under certain conditions; contactCustomer Support for

assistance.

Cable Length

5 m (standard)

75 m (maximum custom cable length)

NOTE: Contact Customer Support if a nonstandard cable length is needed.

Connector Types

3.5-mm stereo plug connector or stripped and tinnedwires

ELECTRICAL AND TIMING CHARACTERISTICS

Supply Voltage (VCC to GND)

Minimum 3.6 VDC

Typical NA

Maximum 15.0 VDC

Digital Input Voltage (logic high)

Minimum 2.8 V

Typical 3.0 V

Maximum 3.9 V

5TE

Digital Input Voltage (logic low)

Minimum –0.3 V

Typical 0.0 V

Maximum 0.8 V

Power Line Slew Rate

Minimum 1.0 V/ms

Typical NA

Maximum NA

Current Drain (during measurement)

Minimum 0.5 mA

Typical 3.0 mA

Maximum 10.0 mA

Current Drain (while asleep)

Minimum NA

Typical 0.03 mA

Maximum NA

Power-Up Time (DDI serial)

Minimum NA

Typical NA

Maximum 100 ms

Power-Up Time (SDI-12)

Minimum 100 ms

Typical 150 ms

Maximum 200 ms

Measurement Duration

Minimum NA

Typical 150 ms

Maximum 200 ms

SYSTEM

COMPLIANCE

Manufactured under ISO 9001:2015

EM ISO/IEC 17050:2010 (CE Mark)

3.2 ABOUT 5TM

The 5TM is designed to measure the water content and temperature of soil (Figure5). The

5TM uses an oscillator running at 70 MHz to measure the dielectric permittivity of soil

to determine the water content. A thermistor in thermal contact with the sensor prongs

provides the soil temperature. The polyurethane coating on the 5TM circuit board protects

the components from water damage and gives the sensor a longer life span.

Connection cable

Thermal sensor

(thermistor)

Dielectric

VWC sensor

Polyurethane

overmolding

Figure5 5TM components

3.3 THEORY

The following sections explain the theory of VWC and temperature measured by 5TM.

3.3.1 VOLUMETRIC WATER CONTENT

The 5TM sensor uses an electromagnetic field to measure the dielectric permittivity of the

surrounding medium. The sensor supplies a 70 MHz oscillating wave to the sensor prongs

that charges according to the dielectric of the material. The stored charge is proportional

to soil dielectric and soil VWC. The 5TM microprocessor measures the charge and outputs a

value of dielectric permittivity from the sensor.

5TE

3.3.2 TEMPERATURE

The 5TM uses a surface-mounted thermistor to take temperature readings. The thermistor is

underneath the sensor overmold, next to one of the prongs, and it reads the temperature of

the prong surface. The 5TM outputs temperature in degrees Celsius unless otherwise stated

in the software preferences file.

If the black polyurethane overmold of the sensor body is in direct sunshine, the temperature

measurement may read high. Do not install the sensor with the overmold in the sun.

SERVICE

4. SERVICE

This section contains calibration and recalibration information, calibration frequencies,

cleaning and maintenance guidelines, troubleshooting guidelines, customer support contact

information, and terms and conditions.

4.1 CALIBRATION

METER software tools automatically apply factory calibrations to the sensor output data.

However, this general calibration may not be applicable for all soil types. For added accuracy

METER encourages customers to perform soil-specific calibrations.

4.1.1 DIELECTRIC PERMITTIVITY

METER factory calibrates each 5TM sensor to measure dielectric permittivity (εa) accurately

in the range of 1 (air) to 80 (water). The unprocessed raw values reported by the 5TM in

standard serial communication have units of 50εa. When used in SDI-12 communication

mode, the unprocessed values have units of εa (for 5TM board versions R2.04 and older, units

are 100εa ).

4.1.2 MINERAL SOIL CALIBRATION

Numerous researchers have studied the relationship between dielectric permittivity and

VWC in soil. As a result, numerous transfer equations that predict VWC from measured

dielectric permittivity. Use any of these various transfer equations to convert raw dielectric

permittivity data from the 5TM into VWC. If using the mineral soil calibration option in METER

ProCheck reader, DataTrac 3, or ECH2O Utility, they convert raw dielectric permittivity values

with the Topp equation (Topp et al. 1980).

Equation 1

VWC4.3 10 5.5 10 2.92 10 5.3 10

aa a

63 42 22

εε ε

=× −× +× −×

−− −−

METER tests show that in a properly installed 5TM sensor in a normal mineral soil

with saturation extract electrical conductivity <10 dS/m, the Topp equation results in

measurements within 3% VWC of the actual soil VWC. If a more accurate VWC is required,

such as working in a soil with very high EC or nonnormal mineralogy, then it may be

necessary to conduct a soil-specific calibration for the 5TM sensor to improve the accuracy

to 1% to 2% for any soil.

There are two options for soil-specific calibration.

• Follow the step-by-step instructions for calibrating soil moisture sensors in the application

note Calibrating ECH2O soil moisture probes.

• METER offers a service providing soil specific calibrations.

This calibration service also applies to soilless materials, such as compost or potting

materials. Contact Customer Support for more information.

5TE

4.1.3 CALIBRATION IN NONSOIL MEDIA

METER has performed calibrations with the 5TM in several nonsoil growth media. The

following are suggested calibration equations for some common materials.

Potting Soil

Equation 2

VWC2.25 10 2.06 10 7.24 10 0.247

aaa

53 32 2

εεε

=× −× +× −

−−−

Rockwool

Equation 3

VWC1.68 10 6.56 10 0.0266

32 2

εε

=× +× +

−−

Perlite

Equation 4

VWC1.07 10 5.25 10 0.0685

32 2

εε

=− ×+×−

−−

METER continually develops additional calibration equations for various other growth media

as opportunities arise. Contact Customer Support for the status of this ongoing research.

The 5TM can accurately read VWC in virtually any porous medium if a custom calibration is

performed (Section4.1.2). Contact Customer Support for more information.

4.2 TROUBLESHOOTING

If problems with the 5TM are encountered, they most likely manifest themselves in the form

of incorrect or erroneous readings. Review the information in Table 1 and the Troubleshooting

METER soil moisture sensors video to identify the problem. Contact Customer Support for

more information.

Table 1 Troubleshooting the 5TM

Problem Possible Solution

Sensor not responding

Check power to the sensor.

Check sensor cable and stereo plug connector integrity.

Check data logger wiring to ensure brown is power supply, orange is

digital out, and bare is ground.

NOTE: Some 5TM sensors may have the older Decagon wiring scheme where the

power supply is white, the digital out is red, and the bare wire is ground.

Sensor reading too low

(orslightly negative)

Check for air gaps around sensor needles. These could be produced

below the surface of the substrate when the needle contacts a large

piece of material and pushes it out of the way, or if the sensor is not

inserted perfectly linearly.

Ensure the calibration equation being used is appropriate for the

media type. There are signiﬁcant differences between substrate

calibrations, so be sure to use the one speciﬁc to the substrate.

SERVICE

Table 1 Troubleshooting the 5TM (continued)

Problem Possible Solution

Sensor reading too high

Check to make sure that the media was not packed excessively or

insufﬁciently during sensor installation. Higher density can cause

sensor reading to be elevated.

Ensure the calibration equation being used is appropriate for the media

type. There are signiﬁcant differences between calibrations, so be sure

to use the one most suitable to the substrate, or consider developing a

substrate-speciﬁc calibration for the particular medium.

Some substrates have an inherently high dielectric permittivity (soils

of volcanic origin or high titanium, for instance). If the substrate has a

dry dielectric permittivity above 6, a custom calibration may need to

be performed. Soils with a bulk EC >10 dS/m require substrate-speciﬁc

calibrations (Section4.1).

Cable or stereo plug

connectorfailure

If a stereo plug connector is damaged or needs to be replaced, contact

Customer Support for a replacement connector and splice kit.

If a cable is damaged, follow these guidelines for wire splicing and

sealing techniques.

4.3 CUSTOMER SUPPORT

Customer service representatives are available for questions, problems, or feedback Monday

through Friday, 7 am–5 pm Pacific time.

Email: support.environment@metergroup.com

sales.environment@metergroup.com

Phone: +1.509.332.5600

Fax: +1.509.332.5158

Website: metergroup.com

If contacting METER by email, please include the following information:

Name

Address

Phone

Email address

Instrument serial number

Description of the problem

NOTE: For 5TM sensors purchased through a distributor, please contact the distributor directly forassistance.

5TE

4.4 TERMS AND CONDITIONS

CONTRACT FORMATION. All requests for goods and/or services by METER Group, Inc. USA

(METER) are subject to the customer’s acceptance of these Terms and Conditions. The

Buyer will be deemed to have irrevocably accepted these Terms and Conditions of Sale

upon the first to occur of the Buyer’s issuance of a purchase order or request for goods or

services. Unless expressly assented to in writing by METER, terms and conditions different

are expressly rejected. No course of dealing between the parties hereto shall be deemed to

affect or to modify, amend, or discharge any provisions of this agreement.

PRICES AND PAYMENT. Invoice prices will be based upon METER prices as quoted or at

METER list price in effect at the time an order is received by the Seller. Prices do not include

any state or federal taxes, duties, fees, or charges now or hereafter enacted applicable to the

goods or to this transaction, all of which are the responsibility of the Buyer. Unless otherwise

specified on the invoice, all accounts are due and payable 30 days from the date of invoice.

Unpaid accounts extending beyond 30 days will be subject to a service charge of 2% per

month (24% per annum). Should Seller initiate any legal action or proceeding to collect on

any unpaid invoice, Seller shall be entitled to recover from Buyer all costs and expenses

incurred in connection therewith, including court costs and reasonable attorney’s fees.

RISK OF LOSS AND DELIVERY TITLE. Liability for loss or damage passes to the Buyer when

the Seller delivers the goods on the Seller’s dock or to the transporting agent, whichever

occurs first. The Seller has the right to deliver the goods in installments. Shipping and

delivery dates communicated by the Seller to the Buyer are approximate only.

SHIPMENT. In the absence of specific shipping instructions, the Seller, if and as requested

by the Buyer, will ship the goods by the method the Seller deems most advantageous. Where

the Seller ships the goods, the Buyer will pay all transportation charges that are payable on

delivery or, if transportation charges are prepaid by the Seller, the Buyer will reimburse the

Seller upon receipt of an invoice from the Seller. The Buyer is obligated to obtain insurance

against damage to the goods being shipped. Unless otherwise specified, the goods will be

shipped in the standard Seller commercial packaging. When special packing is required or, in

the opinion of the Seller, required under the circumstances, the cost of the special packaging

shall be the responsibility of the Buyer.

INSPECTION AND ACCEPTANCE. Goods will be conclusively deemed accepted by the

Buyer unless a written notice setting out the rejected goods and the reason for the

rejection is sent by the Buyer to the Seller within 10 days of delivery of the goods. The

Buyer will place rejected goods in safe storage at a reasonably accessible location for

inspection by the Seller.

CUSTOM GOODS. There is no refund or return for custom or nonstandard goods.

WARRANTIES. The Seller warrants all equipment manufactured by it to be free from

defects in parts and labor for a period of one year from the date of shipment from factory.

The liability of the Seller applies solely to repairing, replacing, or issuing credit (at the

Seller’s sole discretion) for any equipment manufactured by the Seller and returned by the

Buyer during the warranty period. SELLER MAKES NO SEPARATE OR OTHER WARRANTY

SERVICE

OF ANY NATURE WHATSOEVER, EXPRESS OR IMPLIED, INCLUDING THE WARRANTY OF

MERCHANTABILITY OR FOR A PARTICULAR PURPOSE. There shall be no other obligations

either expressed or implied.

LIMITATION OF LIABILITY. Seller will not be liable to the Buyer or any other person or entity

for indirect special, incidental, consequential, punitive, or exemplary damages in connection

with this transaction or any acts or omissions associated therewith or relating to the sale

or use of any goods, whether such claim is based on breach of warranty, contract, tort, or

other legal theory and regardless of the causes of such loss or damages or whether any other

remedy provided herein fails. In no event will the Seller’s total liability under this contract

exceed an amount equal to the total amount paid for the goods purchased hereunder.

WAIVER. In the event of any default under or breach of the contract by the Buyer, the Seller

has the right to refuse to make further shipments. The Seller’s failure to enforce at any time

or for any period of time the provisions of this contract will not constitute a waiver of such

provisions or the right of the Seller to enforce each and every provision.

GOVERNING LAW. The validity, construction, and performance of the contract and the

transactions to which it relates will be governed by the laws of the United States of America.

All actions, claims, or legal proceedings in any way pertaining to this contract will be

commenced and maintained in the courts of Whitman County, State of Washington, and the

parties hereto each agree to submit themselves to the jurisdiction of such court.

SEVERABILITY. If any of the Terms and Conditions set out in this contact are declared

to be invalid by a court, agency, commission, or other entity having jurisdiction over the

interpretation and enforcement of this contract, the applications of such provisions to

parties or circumstances other than those as to which it is held invalid or unenforceable

will not be affected. Each term not so declared invalid or unenforceable will be valid

and enforced to the fullest extent permitted by law and the rights and obligations of the

parties will be construed and enforced as though a valid commercially reasonable term

consistent with the undertaking of the parties under the order has been substituted in

place of the invalid provision.

SET-OFF. The Buyer may not set-off any amount owing from the Seller to the Buyer against

any amount payable by the Buyer to the Seller whether or not related to this contract

5TE

REFERENCES

Hilhorst MA. 2000. A pore water conductivity sensor. Soil Sci Soc Am J. 64(6): 19221925.

Topp GC, David JL, and Annan AP. 1980. Electromagnetic, Determination of Soil Water

Content: Measurement in Coaxial Transmission Lines. Water Resour Res 16(3): 574582.

INDEX

accuracy 7

cable length 8

calibration 12–13

cleaning 13

communication 6, 7

compliance 10

connecting

METER data logger 5

non-METER logger 5–6

connector types 8

customer support 14

data logger 4–6, 7

dielectric permittivity 7, 10, 12

email 14

installation 2

horizontal 3–4

vertical 3

integrator's guide 6

measurements 7–9

mineral soil calibration 12

orientation 4

particle size 2

power requirements 8

range 7

references 17

speciﬁcations 7–10

communication 7

data logger compatibility 7

electrical and timing 8–9

measurement 7

physical 8

temperature 7, 8, 11

terms and conditions 15–17

theory 10–13

troubleshooting 13

volumetric water content 7, 10

wiring 5–6

ZENTRA

ZENTRA Cloud 5

ZENTRA Utility 5

14563-01

4.9.2018

METER Group, Inc. USA

2365 NE Hopkins Court

Pullman, WA 99163

T: +1.509.332.5600 F: +1.509.332.5158

E: info@metergroup.com

W: metergroup.com

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