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Extech RH390 Precision Psychrometer

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  • Measures relative humidity from 0 to 100% and temperature from -30˚C to 100˚C
  • Calculates dew point from -30˚C to 100˚C and wet bulb from 0˚C to 80˚C
  • Slimline ergonomic design with rubberised sides

rrp £172.99

now £145.00 (Ex. VAT) £174.00 (Inc. VAT)

rrp £172.99


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  • Description

    Extech RH390 Precision Psychrometer

    The Extech RH390 Precision Psychrometer is a highly accurate instrument for measuring humidity and temperature. It has a relative humidity range of 0 to 100% RH with basic accuracy of ±2% RH and a resolution of 0.1% RH whilst the air temperature range goes from -30˚C to 100˚C with ±1˚C accuracy and 0.1˚C resolution. These measurements allow the psychrometer to calculate dew point and wet bulb values.

    The Extech RH390’s dual digital display shows humidity readings alongside temperature, dew point or wet bulb. It is operated using a simple push-button interface and boasts data hold and min/max recall functions. The slimline design with rubberised sides makes it very easy to grip and use.

    A carry case and 9V battery are supplied as standard with the Extech RH390 and it is covered by a one-year warranty.

    Extech part number: RH390

    Key Features

    • Relative humidity: 0 to 100% RH
    • Ait temperature: -30˚C to 100˚C
    • Dew point: -30˚C to 100˚C
    • Wet bulb: 0˚C to 80˚C
    • Highly accurate measurements
    • Slimline, ergonomic designs
    • Data hold and min/max
    • One-year warranty
  • Specification

    • Humidity: 0 to 100% RH
    • Temperature (Internal): -22 to 199°F (-30 to 100°C)
    • Basic Accuracy: ±2%RH, ±1.8°F/1°C
    • Max. Resolution: 0.1%RH, 0.1°F/°C
    • Dewpoint: -22 to 199°F (-30 to 100°C)
    • Wet Bulb: 32 to 176 °F (0 to 80°C)
    • Dimensions: 7.8x1.7x1.3" (200x45x33mm)
    • Weight: 7oz (200g)
  • Supplied Accessories

    • Extech RH390 Precision Psychrometer
    • Carry case
    • 9V battery
    • Instructions for Extech RH390
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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:

    Test-Meter.co.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 admin@test-meter.co.uk with your name, address and the items you would like to order for an accurate shipping quote or go to http://www.test-meter.co.uk/test-equipment-export for more information.

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