Portable P250/450


Model At Glance

  • AST A4-EX-FO is a Multi-wavelength pyrometer.
  • AST A4-EX use special algorithms to accurately calculate both the actual temperature and emissivity of the surface.
  • AST A4-EX-FO can hold multiple data base so that single instrument can be easily switched between multiple applications.
  • AST A4-EX-FO offers Bluetooth communication so that it can communicate with Android smart phones or laptop for viewing the measured temperature and for adjusting the parameters / selection of data base and data logging.

Technical Specifications

Model    A4-EX-FO Specification
Emissivity 0.1 -1.0
Response Time 0.1 - 1.0 sec
Default Value 0.5 sec
Accuracy and Repeatability ±1%
Spectral range, mkm 2.0 – 2.4mkm
Power Supply 24VDC
Analog Output 4-20 mA, 0-20 mA, 0-10V,
Digital Output RS-232 or RS-422 USB, Bluetooth
Digital Display P110
Sensor overall dimensions 215 x 110 x 105.0 mm
Sensor weight ~2.0Kg
Operating temperature range Sensor: 0°C +50°C / Optical Head +FOC end: 0°C +200°C
Storage temperature range -20°C +70°C
Humidity Unlimited for the sensor-head

Key Features

  • Simple to use - No calibration required
  • High accuracy - (1%) in real site conditions
  • Capable of measuring targets with variable emissivity
  • Measures through smoke, dust, water vapor etc.
  • Temperature range: 450 to 1500°C
  • Rugged design
  • Full range of accessories
  • Wide range of built-in functions
  • A4-SW Application software for PC
  • A4-SW A Mobile Application software for Android via Bluetooth

Standard Scope of Supply

  • Sensor, FOC and Cable optical Head
  • Digital Interface RS-232
  • Calibration certificate, PC Software & Operation Manual


  • Mechanical and Electrical Accessories
  • Analog Output: 0…20mAor 4....20mA or 0-10V
  • Extra Cable Lengths
  • RS422, USB, Bluetooth


  • General Low Temperature Measurement
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