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HjemBænkinstrumentModulinstrumentSRS SIM modulinstumentSRS SIM923 — Pt RTD temperature monitor

SRS SIM923 — Pt RTD temperature monitor

SRS SIM923 — Pt RTD temperature monitor
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SRS SIM923 — Pt RTD temperature monitor




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  • Four channels with independent displays
  • 20 K to 873 K with platinum RTDs
  • Memory for 4 calibration curves plus standard curve

The SIM923 Platinum RTD Monitor is designed to measure four sensors simultaneously. Based on the modular SIM platform, it provide high-performance and multiple-channel capability in a small footprint.


The four channels in the SIM923 have independent, stable 1 mA current sources to provide sensor excitation. Sensor resistance is determined ratiometrically with a half-bridge circuit consisting of the sensor and an internal reference resistor. The current to the sensor can be reversed by the user to test for any offset.

Measurement results can be displayed in either kelvin or ohms.


The SIM923 employ four-wire measurement circuits (±I excitation leads, ±V sense leads) making the measurements insensitive to series lead resistance. The four channel excitations are independently controlled and do not switch on or off when the readout is advancing between channels.

Sensor excitations can be disabled to reduce power dissipation at sensitive cryogenic stages. This also accelerates readings in the remaining enabled channels. Measurements are performed at rates up to four readings per second.


A factory-standard calibration curve is built in. In addition, each channel has non-volatile memory to store a 256-point custom calibration curve to convert sensor units (V or Ω ) to temperature units (K). Results are displayed on easy to read 4-digit LED displays. Full remote operation is available over the serial interface.

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Instrumentcenter Sweden AB, Box 233, 611 25 Nyköping - Sweden. | Tel: +46 155 26 70 30, Fax: +46 155 26 78 30.
Delivery address: Folkungavägen 4, 611 34 Nyköping, Sweden
E-post:  International phone +46 155 26 70 30  Fax +46 155 26 78 30