Thermalert TX


The Thermalert TX combines high performance non-contact temperature measurement with industry standard two-wire technology. Choose between the smart TX sensor with remotely addressable digital control, or the basic TX.

Smart TX sensors provide digital communication, as well as 4-20mA output, allowing remote configuration and monotoring. Up to 15 sensors can be installed on a single multidrop network.


  • Simple, two-wire installation
  • Simultaneous 4-20mA and digital output for smart TX sensors
  • Compact, rugged sensor with NEMA-4 (IP65) rating
  • Wide temperature range from -18 to 2000°C (0 to 3600°F)
  • Advanced signal processing
  • Point to point or multidrop installation
  • Install up to 15 sensors on a single multidrop network
  • Windows software for remote configuration and monitoring
  • Wide choice of focus distances
  • Special models for glass and plastics applications
  • Intrinsically safe rated versions for use in potentially explosive atmospheres
Measurement Specifications
LT (Low Temp)
LTO (Low Temp)
MT (Medium Temp)
HT (Hight Temp)
G5 (Glass)
P7 (Plastics)
Spectral Response:
8 to 14um (-18 to 500°C)
8 to 14um (0 to 500°C)
3.9um (200 to 1000°C)
2.2um (500 to 2000°C)
5.0um (250 to 1650°C)
7.9um (10 to 360°)
Accuracy ±1% of reading or ±1.4°C, whichever is greater @23°C±5°C.
Repeatability ±0.5% of measured value or ±0.7°C, whichever is greater
Temperature Resolution 0.1°C or 0.2°F for LT models
Response Time (95%) 165 mSec (100mSec for HT models)
Emissivity Adjustable; 0.10 to 1.00 for all models
Signal Processing (smart models) °C/°F, Advanced Peak/Valley Hold, Ambient temperature compensation
Electrical Specifications
Electrical Specifications
Analogue 4-20 mA (all models), maximum loop resistance 700 ohms
Digital (Smart models) Hart or RS-232 (with optional adaptor)
Alarm (Smart models) 24 V/150 mA; adjustable setpoints, deadband, normally open/closed settings
Power Supply 12-24 VDC ±20% (Basic models);24 VDC (Smart models)
General Specifications
Environmental Rating NEMA-4 (IP65)
Ambient Temperature Range (0-70°C) With air cooling - up to 120°C (up to 250°F)
With water cooling - up to 175°C (up to 350°F)
With ThermoJacket - up to 315°C (up to 600°F)
Storage Temperature -18 to 85°C (0 up to 185°F)
Relative Humidity 10-95%, non-condensing
Dimensions 187 mm L x 42 mm diameter (60mm diameter with cooling jacket)



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