FLIR DM91 True RMS Digital Multimeter

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  • Measure electrical parameters such as voltage, frequency and capacitance
  • HVAC-specific parameters including temperature and microamps
  • Stores up to 40,000 results in internal memory, downloadable via Bluetooth

rrp £263.00

now £230.40 (Ex. VAT) £276.48 (Inc. VAT)

rrp £263.00

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  • Description

    FLIR DM91 True RMS Digital Multimeter

    The FLIR DM91 True RMS Digital Multimeter measures a wide range of electrical parameters including voltage, current, resistance, frequency and capacitance. Each parameter can be assessed to a high degree of accuracy and precision and it is also possible to perform continuity checks and diode tests using the multimeter. It is also useful for the HVAC sector thanks to a temperature measurement range of -40˚C to 400˚C and µA range for testing flame sensors. VFD functionality can be used on variable frequency drives and there is also a low impedance LoZ voltage mode that prevents ghost voltage readings.

    The backlit LCD screen on the FLIR DM91 clearly displays digital readouts for all parameters and also features an analogue bar graph which is capable of depicting fluctuating readings dynamically. The test function is selected using the simple dial and the push buttons are used to refine measurements, for example with min/max/avg recording and peak min/max hold. Data hold can be used to manually freeze a reading on screen or auto hold will keep stable readings on screen. The sizeable internal memory has enough space for 40,000 readings and the multimeter has Bluetooth® connectivity which allows it to communicate readings to a smart device or even match up with a FLIR thermal camera via METERLINK® technology.

    The FLIR DM91 is designed to be used in challenging conditions and boasts a comfortable, ergonomic construction with built-in torches for use in poor light. The IP54 protection rating means that the multimeter can withstand splashes of water and even a three-metre drop. A separate non-contact AC voltage detection function warns the user of live voltage presence and the multimeter is rated as Cat IV 300V, Cat III 600V. A limited lifetime warranty covers the instrument against breakdown.

    FLIR part number: DM91

    Key Features

    • Voltage range: 1000V AC/DC
    • Current measurement
    • Frequency range: 1000kHz
    • Resistance: 50MΩ
    • Continuity check
    • Diode test
    • Capacitance range: 40mF
    • Temperature range: -40˚C to 400˚C
    • Backlit digital display with bar graph
    • Min/max/avg recording
    • Peak hold
    • Internal result storage
    • Bluetooth connectivity
    • Limited lifetime warranty
  • Specification


    • Maximum Voltage: 1000 V DC, 1000 V AC True RMS
    • Frequency Counter: 100.00 Hz
    • Frequency accuracy: ±0.1%
    • Resistance: 6.000 MΩ
    • Resistance accuracy±0.9%
    • Continuity Check: 600.0 Ω
    • Continuity accuracy: ±0.9%
    • Capacitance: 10.00mF 
    • Capacitance accuracy: ±1.9%
    • Diode Test: 1.500 V
    • Temperature, Type-K Thermocouple: -40.0 to 400.0°C DMM 
    • Temperature accuracy: ± (1.0% + 3°C) 
    • Measuring Rate: 3 samples per second

    General Information

    • Display Count: 6000
    • Category Rating: CAT IV-600V, CAT III-1000V
    • IP Rating: IP54
    • Battery type: 4x AAA 3x AA
    • Drop Test: 3 metres
    • Battery Life: (Alkaline) approx. 110 hrs ; (Lithium polymer optional): approx. 500 hrs
    • Warranty: Limited lifetime warranty
  • Supplied Accessories

    • FLIR DM91 True RMS Digital Multimeter
    • TA84 Test Leads
    • TA70 insulated Cat IV crocodile clips
    • TA60 type K thermocouple
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  • Delivery Information

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    We use DPD/Interlink for all larger items and Royal Mail for smaller items and accessories. With DPD/Interlink you will receive a 1 hour delivery window on the day of delivery via e-mail/text and a notification 15 minutes before arrival so you will not have to wait around all day. You can even manage your booking online and re-arrange delivery for another date or arrange the goods to be left with a neighbour of your choice.

    We also offer delivery options for goods required urgently on certain products, all which are sent by DPD/Interlink.

    Our charges for UK deliveries:

    • FREE Delivery (on select products only): typically 3-5 working days*
    • Standard Delivery at £4.95: 2-3 working days
    • Next Working Day Delivery (on select products only) at £7.50
    • Pre-Noon Next Working Day Delivery (on select products only) at £9.50*
    • Pre-10.30am Next Working Day Delivery (on select products only) at £18.50*
    • Saturday Pre-Noon Delivery (on select products only) at £14.50*
    • Sunday Pre-Noon Delivery (on select products only) at £14.50*

    *UK mainland only

    NOTE! For next working day or Saturday/Sunday delivery options the order MUST be placed no later than 3pm on the working day before delivery is required. After 3pm, please arrange with our staff before selecting a priority delivery service. Priority services are available to UK mainland residents only (this might exclude certain areas in the north of Scotland).

    Customers outside the UK: exports to many countries all over the world. Prices for shipping vary on location and weight/dimensions. Costs are calculated for certain countries at the checkout. If your country is not included in this list please e-mail with your name, address and the items you would like to order for an accurate shipping quote or go to for more information.

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