Electric Underfloor Heating Multimeter

£24.95 Incl. VAT

In stock

Free delivery over £250 (Exceptions Apply)
Next Day Available | 30 Day Return Policy
Further Delivery Information

Product Overview

Electric Underfloor Heating Multimeter, DT-830B, can measure DCV (0,1mV – 1000V), ACV (0,1V – 750V), DCA (0,1mA – 10A), Ohm (0,1Ω – 2MΩ) diode forward voltage drop and hFE for bipolar PNP and NPN transistors.

Electric Underfloor Heating Multimeter Specification

  • Wide range of operating temperature: -20°C to 75° (32°F to 104°F)
  • Storage temperature of: -10°C to 50°C (10°F to 122°F).
  • Accuracy is guaranteed to stay in the following limits for 1 year, when used at 23°C ± 5°C, less than 75% relative humidity.
  • Frequency range: 45Hz to 450Hz.

AC voltage

Response: Average responding, calibrated in RMS of a sine wave.

Range Resolution Accuracy
200V 100mV ±1.2 % of rdg ± 10 digits
750V 1V ±1.2 % of rdg ± 10 digits

Note: some models have a maximum input voltage of only 600V AC with an overload protection of 600V DC or RMS AC for all ACV ranges.

DC voltage

Range Resolution Accuracy
200mV 0.1mV ±0.5% of rdg ± 2 digits
2000mV 1mV ±0.5% of rdg ± 2 digits
20V 10mV ±0.5% of rdg ± 2 digits
200V 100mV ±0.5% of rdg ± 2 digits
1000V 1V ±0.8% of rdg ± 2 digits

Input impedance: 1MΩ
Maximum input voltage: 1000V DC or 750V rms (200mV scale: 500V DC or 350V AC rms) Note: some models will have a maximum DC input voltage of only 600V with an overload protection of 250V RMS AC for the 200mV range and 600V DC or RMS AC for other ranges.

DC current

Overload protection: F250mA 250V fuse (10A range is unfused!).

Range Resolution Accuracy
200µA 0.1µA ±1.0% of rdg ± 2 digits
2000µA 1µA ±1.0% of rdg ± 2 digits
20mA 0.01mA ±1.0% of rdg ± 2 digits
200mA 0.1mA ±1.5% of rdg ± 2 digits
10A 10mA ±3.0% of rdg ± 2 digits


Maximum open circuit voltage: 3.2V
Overload protection: 250V rms. AC on all ranges.

Range Resolution Accuracy
200Ω 0.1Ω ±0.8% of rdg ± 3 digits
2000Ω ±0.8% of rdg ± 2 digits
20kΩ 10Ω ±0.8% of rdg ± 2 digits
200kΩ 100Ω ±0.8% of rdg ± 2 digits
2000kΩ 1kΩ ±1.0% of rdg ± 2 digits

Other Details

  • Diode approx. testing voltage is 2.8V with a current of 1mA. The overload protection in the diode test mode is 250V RMS. AC.
  • Over range indication: figure “1” on the display.
  • Size: 126x70x25mm
  • Weight: 170g.

For our complete kits please visit – Electric Underfloor Heating

Delivery Information

We have multiple delivery options

  • Next Day Carrier
  • Delivery From Branch 1-5 Working Day
  • Pallet -1-3 Days
  • Standard 1 -3 Day Carrier
  • Economy 1-3 Day Carrier
  • Click & Collect from store


The cost of the carriage will be displayed before your final checkout. Free delivery is available on most items for orders over £250, exceptions do apply.

Click And Collect

Please note that our stock levels are not live. Please contact your local branch prior to purchase, so that we can ensure the product is available to you. If the product isn’t available, we can organise this through an alternative branch.


  • Orders will only be dispatched and delivered on weekdays.
  • Orders for the next working day delivery must be placed before 2 pm, this gives us time to pick and pack before the carrier arrives to collect.
  • We aim to dispatch all carrier delivered items within 48hrs, and all items delivered on our own transport within 5 days, Monday to Friday. Saturday Delivery can be made upon request, depending on availability.
  • An email will be sent when your goods leave us via Carrier, this email will include tracking information. If your order is delayed for any reason, we will contact you.
  • If delivery is from a Branch, then a member of our team will be in contact with you.


We pride ourselves on our customer service, but mistakes can happen. If you receive an incorrect or faulty item, please notify us within 30 days to arrange a refund, return or exchange.


There are no reviews yet.

Be the first to review “Electric Underfloor Heating Multimeter”

Your email address will not be published. Required fields are marked *