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Infrared | Infrared Transmitters | Temperature Measurement Products


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Dias DT 4L Digital Infrared Pyrometer –40 °C to 1000 °C

  • Two-part digital pyrometer with remote measuring head and separate electronics box (IP65)
  • Temperature measurements between –40 °C and 1000 °C
  • 0/4 to 20 mA temperature linear output, switchable
  • Display and programming keyboard
  • Two opto relay outputs, potential-free
  • Small sensor head
  • RS-485 interface
  • 20:1 Fixed Optics
  • Spectral Range: 8 μm to 14 μm


The digital pyrometers PYROSPOT DT 4L are specifically designed for industrial purpose. The devices are suitable for temperature measurement from –40 °C to 1000 °C on many different non-metallic or coated metallic surfaces. The solid body allows usage even under rough environmental conditions. The bright temperature display is visible even over long distance. The very small sensor head allows even the acquisition of measuring object which are difficult of access.
The temperature linear standard output signal of 0/4 to 20 mA allows easy implementation in existing measuring and controlling systems. The device is equipped with a galvanically isolated RS-485 interface, which allows parameterising and software evaluation even in bus systems.
All parameters are adjustable via push-buttons and display directly on the device. Also by using the comfortable parameterising and evaluation software PYROSOFT Spot the parameters can be easily adjusted to the application.

Two-part digital pyrometer with remote measuring head and separate electronics box (IP65)
Best price/performance ratio for OEM application
Adjusted spectral ranges for different applications
Response times t95 from 10 ms
Fixed optics with target sizes starting from 1.3 mm
Small, robust measuring heads for ambient temperatures up to 125 °C
(Optional high temperature version up to 180 °C)
Large, easy-to-read OLED display and operating keys

Easy implementation into existing measurement and control systems with RS-485 interface (galvanically isolated, Modbus RTU)
Temperature linear output 0/4 to 20 mA
Maximum/minimum value memory
Two opto-relay switching outputs (potential-free)

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