Kalibrierstrahler M305

Compact Blackbody Calibration Source

General purpose calibration source for medium temperatures. Temperature range: 100 to 1000 °C (212° to 1832 °F)

Kalibrierstrahler M305 View

Key Features

  • Easily moved when needed. Weighs only 25 kg. (55 pounds)
  • High accuracy ±0.2% of reading ±1 °C
  • High emissivity 1.0 effective at 0.7 to 1.8 µm T>=230°C, 1.0 at 8-14 µm T<230°C
  • Manufactured and tested to meet rigid quality control standards
  • Furnished with certificate of calibration traceable to NIST
  • RS232 (standard) or RS485 (optional) serial communications port


The M305 blackbody calibration source uniquely combines portability with wide temperature range, high emissivity and high accuracy. It is an ideal calibration unit where portability is required or where installation space is limited. Its spherical, metal cavity design yields an emissivity of 0.995 over the temperature range of 100 to 1000 °C (212° to 1832 °F) with an aperture of 25 mm (1”). An integrally mounted PID controller adds to the unique versatility of this calibrator.

Quotations for custom designs and variations are available upon request.

Typical Calibration Applications

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



Temperature Range: 100 °C to 1000 °C (210 °F to 1832 °F)
Accuracy*: ±0.2% of reading ±1 °C
Temperature Resolution: 0.1 °C
Stability: 1 °C per 8 hour period
Source Non-Uniformity: ±0.2 °C typical at T < 230 °C, ±1 °C typical at T > 230 °C
Heated Cavity Shape: Spherical
Aperture Diameter: 25 mm (1.0”)
(calculated from cavity shape):
0.995 ± 0.0005
Effective Emissivity: 1.00 @ 8-14 µm T < 230 °C, 1.00 @ 0.7-1.8 µm T > 230 °C
Temperature Sensor: Thermocouple
Remote Set Point: Via Serial Port
Method of Control: Digital Self tuning PID controller
Warm-up Time: 60 minutes from ambient to 700 °C
Operating Ambient Temp: 0 °C to 44 °C (32 °F to 110 °F)
Cooling: Fan cooled, air inlet on rear panel
Operating Humidity: 90% RH max, non-condensing
Power Requirements: 115V AC @ 50 & 60 Hz or 230V AC @ 50 & 60 Hz, 1000W
Dimensions (H x W x D): 270 mm x 430 mm x 370 mm (10.6” x 16.9” x 14.6”)
Weight: 25 kg (55 lbs.)
CE Certified: Yes

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

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