DDM 900-100/1000 bench thermometer, 1mK resolution

The DDM 900 is designed for precise temperature measurements as demanded in calibration-laboratory use and quality assurance.

Product features

  • Resolution: 1 mK
  • Range: -220 °C to +1200 °C
  • Pt100, Pt500 and Pt1000
  • User defined coefficients for ITS 90 and EN60751
  • Fast measurements: up to 8/s
  • Excellent long-time stability
  • Compensation of self heating error
  • No impairment of the measurement results through parasitic thermovoltage
  • Extensible up to 81 measuring channels
  • True 4-wire-technique with Lemo-plugs
  • High EMC
  • High data reliability in terms of sensor coefficients

Accessories such as e.g. multiplexers and sensors can be found in our reference temperature catalog. You can download it directly    here

Order No.: 5020-0901
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Technical data

Measuring range

-200°C up to 962°C (according to ITS-90)
-200°C up to 850°C (according to DIN EN60751)

Resolution 1 mK
Measuring uncertainty

Pt100: 10 mK (5 mK -50°C...+250°C)
Pt500: 15 mK (7 mK -50°C...+250°C)
Pt1000: 10 mK (5 mK -50°C...+250°C)


Measuring channels 2 (optionally up to 81 with external multiplexers)

Pt-100, Pt500 and Pt1000 in 4-wire circiut

Connectors Lemo 1S, quadripolar, in front panel
Measuring current about 0,5 mA switched DC (about 1 mA for Pt-25)
Measuring time about 1 sec. per channel, about 0,1 sec. per channel with
reduced resolution
Long-term stability 5 mK / year
Temperature coeff. 1 mK/K
Display LCD, LED backlight, 2 lines ¨¤ 16 characters, 9 mm height
Units °C, °F, K, Ohm
Interface RS-232, isolated
Operation menu orientated, alternatively controllable by your PC
Memory 128 KB (optionally 512 KB)
Suppy 230 V, 50 Hz / 115 V, 60 Hz about 15 VA

300 x 160 x 300 (width x height x depth in mm)


8.00 kg


DDM 900 (German)
DDM 900 (English)

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