
R A Y N G E R M X P O R T A B L E N O N C O N T A C T T H E R M O M E T E R S
F E A T U R E S  | 
  | MX2 | MX4 | MX4+ | |
  | Adjustable emissivity  | ✓  | ✓  | ✓  | |
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  | -  | ✓  | ✓  | ||
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  | ✓  | ✓  | ✓  | ||
  | Class 2 & FDA Class II requirements  | 
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  | *Single Laser Class III  | ✓  | -  | -  | |
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  | Audible/visible High alarm  | ✓  | ✓  | ✓  | |
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  | Audible/visible Low alarm  | 
  | ✓  | ✓  | |
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  | MAX and MIN temperature  | ✓  | ✓  | ✓  | |
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  | DIF and AVG temperature  | -  | ✓  | ✓  | |
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  | Bar graph display  | ✓  | ✓  | ✓  | |
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  | Data output: RS232 or  | -  | ✓  | ✓  | |
  | 1 mV per degree (°C or °F)  | 
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  | 100 points of data logging  | -  | ✓  | ✓  | |
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  | -  | -  | ✓  | ||
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  | Data Graphing Software  | -  | -  | ✓  | |
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  | Power Supply (110 or 220V),  | -  | -  | ✓  | |
  | RS232 Computer Cable, 1.5 m (60 in),  | 
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  | K thermocouple probe | 
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*MX2 available with either 
O P T I O N S / A C C E S S O R I E S | 
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■   | ■  | Thermistor (NTC) probe  | |
■  | RS232 computer cable*  | ■  | Portable thermal printer  | 
■  | Thermocouple K probe*  | ■  | Calibration Certification  | 
■   | ■  | Soft pouch  | |
*Standard with Raynger MX4+  | 
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S P E C I F I C A T I O N S | 
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Temperature range  | |
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Accuracy*  | ±1% of reading or ±1°C (±2°F), whichever is greater  | 
Repeatability*  | ±0.5% of reading or ±1°C (±2°F), whichever is greater  | 
Response time  | (95%) 250 mSec  | 
Spectral response  | 8 to 14 µm, thermopile detector  | 
Display resolution  | tenth degree reading up to 900°C (0.2°F to 999.8°F)  | 
Ambient operating range  | 0 to 50°C (32 to 120°F)  | 
Relative humidity  | |
Storage temperature  | |
Power  | 2 AA batteries, DC power for MX4 and MX4+  | 
Tripod mount  | |
Dimensions  | 200 x 170 x 50 mm (7.9 x 6.7 x 2 inches)  | 
Weight  | 480 g (1 lb. 6 oz)  | 
*only at 23°C (73°F)  | 
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Target Spot Sizes and Distances
25mm  | 19mm  | 286mm  | 
@ 0m  | @1.15m  | @10m  | 
1.0"  | 0.76"  | 11"  | 
@ 0"  | @ 3'10"  | @ 32.8'  | 
MX2, MX4, MX4+ and MXSZ
D:S = 60:1 at Focus Point
25mm  | 6mm  | 70mm  | 
@ 0mm  | @300mm  | @1000mm  | 
1.0"  | 0.24"  | 2.81"  | 
@ 0"  | @ 11.4"  | @ 40"  | 
MXCF (Close Focus)
D:S = 50:1 at Focus Point
A P P L I C A T I O N S
The rugged, ergonomic MX has many uses:
■check for hot spots in electrical panels, circuit breakers, generators, and gearboxes
■monitor supply and return registers, air stratification, and duct leakage
■monitor temperatures of gasoline and diesel engine cylinders and railroad axles and bearings
■food preparation and storage
■Industrial predictive and preventative maintenance.
■Checking for icing and deicing on planes and asphalt
■Checking for depleted refrigeration media
■Cold storage and 
■Frozen food safety and processing
■ISO 9000 proactive maintenance programs
■Checking for bearing failures and motor misalignment
■Power distribution trouble shooting
■Electrical bench work in the shop or lab
For Sales and Ordering Contact:
5710 Kenosha Street Richmond, Illinois 60071 USA Phone: +1 (815) 
Your Authorized Watlow Distributor Is:
For Service and
Warranty Contact:
Worldwide Headquarters
Raytek Corporation
Santa Cruz, CA USA
Tel: 1 831 458 1110
800 866 5478 (U.S. and Canada only) Fax: 1 831 425 4561 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.