Martindale TEK300 20mA Loop Calibrator
Trusted by Professionals
Martindale Electric on Facebook Martindale Electric on Twitter Martindale Electric on Linked In Martindale on YouTube

Martindale TEK300 20mA Loop Calibrator

Martindale TEK300 20mA Loop Calibrator
general image
general image
Martindale Part No: MARTEK300

The Martindale TEK300 process control calibrator features sink, source and monitor modes for 0 - 20mA and is ideal for most process control applications, as well as general purpose signal injection applications.

The handheld unit is fully portable and has a large 3.5 digit LCD display, with overload protection for extra safety.

The Martindale TEK300 is supplied with batteries & instruction manual.

DC / DC Converter output
  • 28.5V (+0.1V)

Current Range

  • 0 - 20mA F.S. (+0.1%)


  • 10A

Temperature Drift

  • 150ppm / C


  • +0.15%

Output Noise (typically)

  • 4mV p/p


  • LED (Green) - Battery OK
  • LED (Red) - Output Error

General Specifications

  • Display: 3 1/2 digit LCD
  • Output Connectors: 4mm terminal posts (19.05mm apart)
  • Operating Temperature: 0 - 50C
  • Supply: 2 x 9V batteries MN1604 or equivalent (included)
  • Housing: Light grey ABS handheld, with stand
  • Dimensions: 180 x 100 x 44mm
  • Weight: 380g approx

Please click the links below to download the application notes in pdf format.

Where can I get my instruments calibrated?

Print    Bookmark    Manual     Datasheet   
general image
general image
Metrohm - a Martindale Brand
Drummond - a Martindale Brand
Luckins Logo - Martindale is listed in Luckins Live Martindale Electric Co Ltd, Metrohm House, Imperial Park, Imperial Way, Watford, Hertfordshire, WD24 4PP
Company Registration No: 3387451. © Martindale Electric Co Ltd 1997 - 2019, all rights reserved.
T: +44 (0) 1923 441 717   F: +44 (0) 1923 446 900   E:
E. & O.E. Privacy Notice | Terms & Conditions | Contact Us