RTD Simulator (HandySim 38505)

The RTD Simulator (DigiSim 38505) is a micro-controller based portable, battery-operated, precision instrument designed for sourcing as well as measuring Ω & RTD signals. A graphical (128x64) LCD with backlight gives excellent user interface. It is designed to calibrate instruments taking either RTDs or Ω as an input and retain its precision & repeatability over long periods in worst environmental conditions. An exceptionally stable resistance source provides continuously variable precision output signals with two ten-turn potentiometers.


  • Simulates & measures Ohms & RTDs
  • High precision, accuracy, reliability & longevity
  • Graphical(128x64) LCD with backlight for excellent UI
  • Simultaneous display of temperature & Ohms
  • Automatic lead compensation for 3-wire RTDs
  • Eliminates the need of decade resistance boxes
  • Compact in size and built for toughest environments
  • Unique self-check facility ensures reliable operations
  • Powered by AC/DC adapter or 9V Ni-Mh battery


  • Simulates & measures multiple RTDs (2-wire/3-wire)
  • Calibrates temperature indicators with RTD input
  • Works as ohms source
  • Calibrates temperature controllers and transmitters


Resistance RTDs[1]

Pt46 -200 to 850°C

Pt100 -200 to 850°C
0-500 Ω Pt200 -200 to 400°C

Cu53 -50 to 180°C

Ni100 -60 to 180°C

0.1 Ω 0.1 °C


Display Specifications

Display Graphical (128x64) LCD with backlight
Function Ω RTDs
Resolution 0.1Ω 0.1 °C

Other Specifications

Bridge Current 0.1 to 1 mA depending on range
Effect of leads 1°C for 10% of nominal resistance per lead for 3-wire RTDs.
Mains Operation Power jack for AC/DC adapter/charger (230VAC,50Hz to 10.5VDC,100mA)
Input Protection I/O terminals are protected upto 24 VDC
Storage Temperature 0 to 70°C w/o batteries and accessories
Humidity Less than 90% Rh (Non-condensing)
Operating Temperature 5 to 55°C


Function Ω RTDs
Resolution 0.1Ω 0.1 °C
Accuracy ± 0.02% rdg ± 0.01% FS ± 2 dgt ± 0.05% rdg ± 0.05% FS ± 1 dgt
Self-check 444.4 ± 2 digits Not Applicable

Power Supply options are as follows:

Battery Type Battery Life Status
9V Ni-Mh battery with longer life for field use 10 - 12 hours in continuous use Displays battery level using status bars and "LoBAT"
Humidity < 90% Rh (Non-condensing)
Zero Drift < 1dgt per 10°C outside the range of 22 ≤ TA ≤ 32°C
Span Drift < 0.0015% of rdg / °C
Storage Temp 0 to 70°C w/o batteries and accessories
Enclosure Dimension 75(W) x 150(H) x 50(D) mm
Enclosure Finish Powder Coated
Enclosure Weight 600g w/o batteries
Accessories Included BS-5(4mm) probes, crocodile clips, screw driver, leather case, AC/DC adapter
Optional 9V Ni-Mh battery, external battery charger, wooden case
Documentation Included Warranty certificate[1], Calibration certificate[2], User manual, RTD temperature tables
Optional NABL Calibration certificate
contact Us
  • FF 1-2, Barahi Avenue
  • 990/3/1, GIDC, Makarpura,
  • Vadodara - 390010, Gujarat, India.
  • E-mail ID :
  • Phone No : +91-265-2642854 , +91-9974002937
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