Model 1901 - Microprocessor

Model 1901 Microprocessor based 3 digit LED temperature indicators provide a cost effective approach to accurate temperature measurement. Simple adjustments are made via two front panel-mounted buttons. These buttons provide access to “Sp Cal” and Alarm Setpoints.
(As of 2011, Model 1900 has been rendered obsolete)

Additional information will be available in the near future.
Please contact us for immediate follow through.



  • MODEL 1901
  • SensorSi410 Grouping Diode
  • Sensor Excitation10 Microamps
  • Temperature Range1.5K – 450K
  • Resolution.1K to 1.5K–99.9K // 1K to 100K–450K
  • Accuracy± .1K to 1.5K–99.9K // ± 1K to 100K–450K
  • Power110 or 220 Vac/9 VDC at 500mA
  • Alarm Setpoint(2) SPDT 28 VDC relays
  • RS232C InterfaceStandard
  • Analog OutputOptional: 0-1 VDC or 0-4 VDC
  • (3.8” W x 1.9” H x 5.8” D (96 x 48 x 147mm))
  • (*SpCal (single point cal), offsets display at a specific temperature to improve system accuracy.)


Connectors Supplied

5 pin male sensor plug; 110 or 220 VAC Adapter to 9 VDC;
RS232C, position RJ modular with 7 foot cable; Analog Out – Mini 2-pin banana jack.

For more information, please send us an email or call us at 1-800-466-6031. A Scientific Instruments associate will be happy to assist you.

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