Testo 435-1 Multifunction HVAC Meter

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  • An ideal meter for assessing indoor air quality
  • Compatible with a wide range of classic and radio probes
  • Measures CO2, temperature, humidity and dew point

rrp £379.00

now £330.00 (Ex. VAT) £396.00 (Inc. VAT)

rrp £379.00


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  • Description

    Testo 435-1 Multifunction HVAC Meter

    The Testo 435-1 Multifunction HVAC Meter can measure a wide range of different HVAC-related parameters including air temperature, CO2 levels, humidity, absolute pressure, surface temperature, and air flow velocity. The range, resolution and accuracy depends on the type of probe attached and the meter is capable of taking two connections at once via two separate inputs. An optional radio module allows the connection of up to three wireless probes simultaneously. The meter is particularly useful for performing comprehensive assessment of indoor air quality.

    Measurements and readings are displayed on the Testo 435-1’s large digital screen and operation is undertaken via the simple push button interface. Radio probes can operate at a distance of 20m and the meter features probe-dependent menus for individual measurement parameters as well as user profiles for both duct measurement and IAQ measurement. Calculation of dew point is a useful additional feature for IAQ assessment. The meter is capable of displaying min, max and mean values for each parameter.

    The Testo 435-1 has rugged external housing which makes it ideal for use in challenging environments and it is compatible with the optional Testo fast printer. The printer can produce instant copies of single results or entire measurement sets, thus contributing to greater efficiency. The meter has a 200-hour battery life.

    Testo part number: 0560 4351

    Key Features

    • Max temperature range: -200˚C to 1370˚C
    • Max humidity range: 0 to 100%
    • Absolute pressure range: 0 to 2000hPa
    • Max air flow velocity range: 0 to 60m/s
    • Ambient CO2 range: 0 to 10000ppm
    • Ideal for IAQ measurement
    • Compatible with radio probes and printer
    • 200-hour battery life
  • Specification

    Temperature - NTC

    • Measuring range: -50 to +150 °C
    • Accuracy: ±0.2 °C (-25° to 74.9 °C); ±0.4 °C (-50 to -25.1 °C); ±0.4 °C (+75 to +99.9 °C); ±0.5 % of mv (Remaining Range)
    • Resolution: 0.1 °C

    Temperature - TC Type K (NiCr-Ni)

    • Measuring range: -200 to +1370 °C
    • Accuracy: ±0.3 °C (-60 to +60 °C); ±(0.2 °C + 0.5 % of mv) (Remaining Range)
    • Resolution: 0.1 °C

    Temperature - TC Type T (Cu-CuNi)

    • Measuring range: -200 to +400 °C
    • Accuracy: ±0.3 °C (-60 to +60 °C); ±(0.2 °C + 0.5 % of mv) (Remaining Range)
    • Resolution: 0.1 °C

    Humidity - Capacitive

    • Measuring range: 0 to +100 %RH
    • Accuracy: See probe data
    • Resolution: 0.1 %RH

    Absolute Pressure

    • Measuring range: 0 to 2000 hPa
    • Accuracy: See probe data

    Velocity - Vane anemometer

    • Measuring range: 0 to +60 m/s
    • Accuracy: See probe data
    • Resolution: 0.01 m/s (60 + 100 mm Vane); 0.1 m/s (16 mm Vane)

    Velocity - Hot wire anemometer

    • Measuring range: 0 to +20 m/s
    • Accuracy: See probe data
    • Resolution: 0.01 m/s

    Ambient CO2 (via IAQ probe)

    • Measuring range: 0 to +10000 ppm CO₂
    • Accuracy: See probe data
    • Resolution: 1 ppm CO₂

    General technical data

    • Dimensions: 220 x 74 x 46 mm
    • Operating temperature: -20 to +50 °C
    • Housing: ABS / TPE / Metal
    • Protection class: IP54
    • Battery type: Alkali manganese, mignon, type AA
    • Battery life: 200 h (typical vane measurement)
    • Display lighting: Illuminated display
    • Storage temperature: -30 to +70 °C
    • Weight: 428 g
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  • Delivery Information

    At we understand the importance of a reliable delivery service when shopping online. Especially when the goods are often essential to your working day. If your goods are required by a certain date please feel free to contact us for an honest and realistic indication whether this can be met. We aim to process all orders we receive within 1 to 3 working days, however from time to time we do have an increased demand for certain products or there might be delays from the manufacturer. In such cases delivery of your equipment may be subject to a minor delay.

    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.

    For more information on delivery, please see our terms and conditions.