Raytek Mid Users Manual

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Raytek MID

Noncontact Infrared Temperature Sensor

Product Description
The MID™ is a two-piece infrared temperature measurement system with

Highlights:

miniature sensing head and separate electronics. The sensor is small
enough to be installed just about anywhere, yet it performs as well as
much larger systems. And the MID electronics include a host of signal
processing features which you won’t normally find in systems in this
price range, including Emissivity, Peak Hold, Valley Hold, and Averaging,

• Small sensing head fits where other sensors can’t
• Ambient operating range to 85°C (185°F) without cooling
• 5-digit backlit LCD interface

all of which are adjustable on the 5-digit LCD interface.

• Adjustable emissivity, peak hold, valley hold and averaging

Designed for applications where the target temperature is in the -40 to

• 1% Accuracy from -40 to 600°C (-40 to 1112°F)

600°C (-40 to 1112°F) range, the sensor is housed in a rugged stainless

• Choice of 2:1 or 10:1 optics

steel enclosure to ensure long term performance, even in harsh industrial
environments with ambient temperatures up to 85°C (185°F) without

• Powered by 12-24 VDC at ≤100 mA

cooling.

• Accessories for cooling and air purging

Although the MID is small in size, it still has the features you need,

• Remote electronics box

with 1% accuracy and a choice of 2:1 or 10:1 optics, with user selectable
output signals. And the MID’s response time is as fast or faster than
many high-end systems.
The MID’s miniature size and low cost make it ideal for installation at
multiple points along your process. Accurate. Easy to install. Affordable.
With the MID, precision infrared temperature measurement is now an
economical alternative.

• User selectable output signals
• Optional RS232 or RS485 communication

Raytek MID
Nominal Optical Specifications

Measurement Specifications
Spectral Response:
Optical Resolution:
Temperature Range:
System Accuracy:

System Repeatability:
Temperature Coefficient:
Temperature Resolution:
System Response Time:
Emissivity:
Transmission:
Signal Processing:

8 to 14 microns
2:1 or 10:1
-40 to 600°C (-40 to 1112°F); -25 to 600°C for
J-thermocouple output
±1% of reading or ±1°C, whichever is greater
@23°C±5°C (73°F±9°F). Thermocouple output
accuracy ±1% of reading or ±2.5°C, whichever is
greater @23°C±5°C
±0.5% of reading or ±0.5°C (1°F), whichever is greater
0.15K per K or 0.15% per K, whichever is greater
0.3°C or 0.5°F
150ms (95%)
0.100 to 1.100 digitally adjustable increments of .001
0.100 to 1.100 digitally adjustable increments of .001
Peak Hold, Valley Hold, Variable Averaging Filter,
adjustable up to 998 seconds

D:S is the optical resolution expressed as a ratio of the distance
to the resolution spot divided by the diameter of the spot.
Optical resolution for the MID is 2:1 and 10:1.
Nominal spot size based on 90% energy.

General Dimensions
Sensing Head

Electrical Specifications
Outputs:

Cable Length
Output Impedance (T/C output)
Minimum Load Impedance (mV output)
Maximum Loop Impedance (mA output)
Current Draw:
Power Supply

Scalable 4-20mA, 0-20mA, 0-5V,
J or K thermocouple
10mV/°C Head Ambient signal
1 m (3.2 ft) standard, 3m (9.8 ft.) optional
20 ohm
100K ohms
500 ohms with 24 VDC power supply
100 mA
11-26 VDC

Electronics Housing
25
(1.0)

60
(2.
4)

General Specifications
Environmental Rating
Ambient Temperature Range:
Sensing head
With air cooling
Electronics housing
Storage Temperature
Relative Humidity
Construction:
Sensing head
Electronics housing
Weight:
Sensing head (w/1 m cable)
Electronics housing

NEMA-4 (IP 65)
0 to 85°C (32 to 185°F)
-18 to 200°C (0 to 392°F)
0 to 65°C (32 to 150°F)
-18 to 85°C (0 to 185°F)
10 to 95%, non-condensing
Stainless steel
Zinc, die-cast

80 )
2
(3.

mm (in)

Accessories / Options*
Each standard MID package includes a sensing head, one mounting nut,
1 m (3.2 ft) of cable, die-cast housing with premounted electronics, and an
operator’s manual
• Adjustable or fixed mounting bracket
• Air purge jacket
• Air cooling/purging system
• Longer cable: 3m (9.8 ft.)*

50 g (1.75 oz)
270 g (9.5 oz)

• Rs232 or RS485 communication*
*Must be specified at time of order

For Sales and Ordering Contact:

5710 Kenosha Street
Richmond, Illinois 60071 USA
Phone: +1 (815) 678-2211
FAX: +1 (815) 678-3961
Internet: www.watlow.com
e-mail: info@watlow.com

Your Authorized W atlow Distributor Is:

For Service and
W arranty Contact:

Worldwide Headquarters
Raytek Corporation
Santa Cruz, CA USA
Tel: 1 831 458 1110
800 227 8074 (U.S. and Canada only)
Fax: 1 831 458 1239
www.raytek.com
Raytek, the Raytek logo, and Thermalert are registered trademarks
of Raytek Corporation.
©2001 Raytek Corporation, Printed in USA, 3/01 Rev. A
Specifications subject to change without notice. 3-1022

RIC-MID-0401



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