Whadda Electronic Thermostat Minikit WSHA138

    1-5 Days
  • Description
  • More Details
  • Specifications
Available pre-assembled: VM137

Replacement for Velleman MK138

General purpose low-cost electronic thermostat with NTC temperature sensor from the Velleman Mini Kit range. Output relay with LED indicator. Suitable for a wide range of applications: Greenhouses, egg incubation, heating & cooling projects.

  • temperature range: +5°C to +30°C approx. (41°F to 86°F)
  • relay power rating: 24VDC/AC 3A

      Constructional Kit: Normal

    Click to open


    The following alterations will allow you to increase the temperature range of the MK138. To make it suitable for use as an egg incubator thermostat (37.5º) with a hysteresis of approximately ±0.4º. You will need to change the value of these components. Available from esr.co.uk using the order code listed.

    • R4 4K7 1% (Order Code 907-247)

    • R5 3k9 5% (Order Code 906-239)

    • R6 2K7 5% (Order Code 906-227)

    • R7 10M 5% (Order Code 906-610)

    • RV1 1K (Order Code 994-210)

  • Dimensions: 54 x 62 x 28mm
    Power Supply: 12Vdc / 100mA