Thermalert XR

The Thermalert XR combines high performance non-contact temperature measurement with industry standard four-wire technology locally configurable at the measurement head. The Raytek XR Sensors are designed for continuous temperature monitoring in a broad range of manufacturing processes. The XR is a rugged, NEMA 4 sealed single-piece system with the flexibility to handle nearly any application. Multiple extended temperature ranges, precision temperature resolution, RS-485 output and a flexible electronic platform create a single sensor that solves the most challenging application.

Optional laser sighting and high-resolution optics provides the solution for either small targets or long sight-tubes. An intuitive user interface reduces setup time and adds powerful trouble-shooting capabilities. Common and configurable installation hardware and software reduces installation expense and variation. The Raytek XR has a flexible user defined analog output, allowing this sensor to be installed with almost any existing control system. This unique capability sets a new standard for process monitoring. The Raytek XR sensor insures a consistent manufacturing process and allows tighter tolerances on heating processes, reducing heating costs.


  • Multiple temperature ranges
  • Optional stainless steel housing
  • Optional laser sighting and high resolution optics
  • Flexible user defined analog output • Simultaneous analog and digital outputs
  • Choice of field wiring or quick connector wiring option
  • Special models for glass and plastics applications
  • User-scalable 0/4-20 mA or 0-5 V output
  • User-selectable 0/4-20 mA, 0-5 V, J or K thermocouple output
  • Local user-interface for sensor programming
  • Optional laser sighting and high resolution optics
  • Filed calibration software
  • DataTemp MultiDrop Software compatibility
  • Programmable relay outputs
  • Bi-directional RS485 communications supports networks of up to 32 sensors
  • Complete set of installation accessories available
Measurement Specifications
LT (Low Temp)
LTHSF (Low Temp)
MT (Medium Temp)
G5 (Glass)
P7 (Plastics)
Spectral Response:
8 to 14um (-40 to 600°C) optics 33:1
8 to 14um (-40 to 600°C) optics 50:1
3.9um (250 to 1200°C) optics 30:1
5.0um (250 to 1650°C) optics 33:1
7.9um (10 to 360°) optics 30:1
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 °C/°F, Advanced Peak/Valley Hold, Ambient temperature compensation
Electrical Specifications
Analogue 4-20 mA (all models), maximum loop resistance 700 ohms
Digital RS-232 (with optional adaptor)
Alarm 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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