Calibration Source M316 (US)

Portable Low Temperature Calibration Source

The M316 Ultra-Portable Calibration Sources Operates to 300 °C or 572 °F

Available for sale in the US only.

Calibration Source M316 (US) View

Key Features

  • Provides maximum portability and flexibility
  • Excellent general purpose calibration
  • High effective emissivity 1.0 at 8-14 µm
  • Highly uniform
  • Large aperture 57 mm (2.25”) diameter
  • High accuracy, high resolution
  • Excellent stability 0.5 °C per 8 hour period
  • Fast slew rate (heat uptime)
  • Manufactured and tested to meet rigid quality control standards


The two-piece portable M316 Blackbody Calibration Source is an ideal unit for field calibration or verification of infrared temperature sensors.

The calibration source of the M316 is contained within a compact, hand-held housing weighing only 0.9kg (2.0 lbs.). It is connected by a flexible cable to the 0.70kg (1.5 lbs.) indicating controller, which can be carried via handle or shoulder strap. Because of the small size of the calibration source, the operator can easily position it to read the sensor, even in hard to reach locations. Consequently there is no need to remove the sensor from its position.

The M316 calibration source covers a temperature range from ambient +10 to 300 °C (572 °F), with an accuracy of ±0.5% of reading ±1°C. A precision RTD temperature sensor is embedded in the blackbody emitter providing high accuracy and repeatability. The temperature controller uses the industry standard PID algorithms to control the emitter temperature to within +/-0.5 °C. The blackbody emitter mechanism uses a resistive heating device that provides long life, short stabilization times and stable temperature control. 

Typical Calibration Applications

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



Temperature Range: Ambient +5 to 300 °C or 572 °F 
Accuracy*: ±0.5% of reading ±1 °C
Temperature Resolution: 1 °C
Stability: 0.5 °C per 8 hour period
Cavity: Flat Plate
Aperture Diameter: 57 mm (2.25”)
Emissivity: 1.0 at 8-14 µm
Temperature Sensor: Precision platinum RTD
Method of Control: Digital PID Controller
Warm-up Time: 10 minutes from room temperature to 200 °C
Operating Ambient Temp: 0° to 50 °C (32° to 122 °F)
Method of Mounting:

Blackbody Module: handle grip and 1/4-20 tapped hole for tripod mount
Control Module: Bench mount or shoulder strap for field use

Operating Humidity: <90% non-condensing
Power Requirements: 115V AC @ 50 & 60 Hz 300W max.
Dimensions (H x W x D):

Blackbody Module:
203 mm x 89 mm x 98 mm (8” x 3.5” x 3.86”)
Control Module:
102 mm x 178 mm x 127 mm (4” x 7” x 5”)


Blackbody Module: 0.9 kg (2.0 lbs.)
Control Module: 0.70 kg (1.5 lbs.)

CE Certified: No

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

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