Calibration Source M315-HT

Portable Low Temperature Blackbody Calibration Source

Compact and portable calibration source with very large surface area. Range: Ambient +5 to 450 °C or 842 °F

Blackbody M315-HT

Key Features

  • High emissivity
  • Excellent general purpose calibration
  • Large aperture (3” diameter)
  • High accuracy, high resolution
  • Compact, lightweight
  • Manufactured and tested to meet rigid quality control standards
  • Furnished with certificate of calibration traceable to NIST
  • RS232 serial communication (included)


The M315HT is a two-piece portable blackbody calibration source with a digital indicating controller that can be set at any temperature between ambient +5 °C to 450 °C or 842 °F. Once set, the source temperature is controlled to within ±0.3 °C by an internal RTD sensor. The unit has an emissivity 1.00 at 8-14 µm.

The M315HT calibration source and the digital indicating controller are contained in separate housings to allow greater flexibility in positioning the instrument within an installation, e.g. long path calibration.

Typical Calibration Applications

  • Infrared Temperature Sensors
  • Infrared Thermal Imaging Systems
  • Spectrographic Analyzers
  • Radiometers
  • Flux Meters


Technical Data

Temperature Range: Ambient +5 °C to 450 °C or 842 °F
Accuracy*: 0.25% of reading ±1 °C
Temperature Resolution: 0.1°
Stability: 0.3 °C per 8 hour period
Cavity: Flat Plate
Aperture Diameter: 76 mm (3.00 in.)
Emissivity: 1.00 effective emissivity at 8-14 µm
Temperature Sensor: Precision platinum RTD
Method of Control: Digital PID Controller
Operating Ambient Temp: 0 to 44 °C (30 to 110 °F)
Operating Humidity: 90% RH max, non-condensing
Power Requirements: 115V AC ±10% 50/60 Hz 600W max. (230V or 100V AC Optional)
Dimensions (H x W x D): 178 mm x 279 mm x 178 mm (7” x 11” x 7”)
Blackbody Source:
167 mm x 210mm x 280 mm (6.6” x 8.29” x 11.02”)
Control Module (M315):
167 mm x 210 mm x 280 mm (6.6” x 8.29” x 11.02”)
Weight: Blackbody: 4.9 kg (10.8 lbs.)
Controller: 3.2 kg (7 lbs.)
CE Certified: Yes

*Accuracy calibration performed radiometrically, the uncertainty of emissivity and transfer standard are already included.

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