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Extech RH550 Humidity and Temperature Chart Recorder

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  • Professional humidity and temperature Chart Recorder with intuitive touch-screen technology
  • Realtime humidity, temperature and dew point readings in simultaneous graphical and numerical displays
  • Utilise an interactive touch-screen complete with screen capture capability through the swipe of a finger
(Ex. VAT) £363.00 (Inc. VAT) £435.60

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  • Description

    Extech RH550 Humidity and Temperature Chart Recorder

    The Extech RH550 Humidity and Temperature Chart Recorder is the ultimate tool for monitoring humidity, temperature or dew point within an environment where such factors are critical. Whether it's a conference room, green house, hospital or food storage facility the RH550 is capable of displaying realtime, accurate numerical and graphical data simultaneously. Adjust the chart to live or scheduled recording, with time/date available in live mode, and utilise a selectable sampling rate set anywhere between 1 second and 24 hours. Relative humidity is taken within a 10% to 95% RH range, with the sensor attached directly to the monitor temperature is recorded between -10 and 40˚C or within -20 to 80˚C when the sensor is attached via the cable, finally the dew point is calculated between -20 and 80˚C.

    With it's large 178mm high-resolution LCD display, the RH550 offers operators a tactile, fully programmable touch-screen. This 1024 x 600 pixel TFT colour monitor, complete with display zoom feature, offers the unparalleled ability to capture a screenshot with a simple swipe of the finger. Easily store up to 20,000 data points in CSV format with the incorporated 16GB memory, before transferring them to a computer via a convenient built-in USB port.

    The extensively customisable menus, accessible through the RH550's sizeable display, produce audible and visual high/low point alarms. Avoid unnecessary setting complications with the ability to sort these alerts by either date or temperature and humidity values. Organisation is made even easier by the MIN/MAX records which helpfully tracks all minimum and maximum points of the humidity, temperature and dew point data collected. Should the Chart Recorder see an abundance of use, Extech have included a convenient memory progress bar which indicates used memory and percentage free remaining.

    Position the RH550 wherever needed as the Extech device has an integrated stand for desktop and an included bracket for wall mounting. The field-replaceable probe can be clipped directly onto the tablet or alternatively attached to a 1.8m cable. Should the lead prove to be too short, up to 3 probe cables can be connected together. An internal rechargeable lithium polymer battery and 2 year warranty ensures reliability and completes a must-have, supremely high quality humidity and temperature chart recorder.

    Key Features

    • Monitor temperature, humidity or dew point
    • Data provided in a numerical and graphical format simultaneously
    • Relative humidity recorded when in the 10% to 95% range
    • Temperature (with sensor directly attached) recorded between -10 to 40˚C
    • Temperature (with sensor attached to cable) recorded between -20 to 80˚C
    • Dew point calculated within the range -20 to 80˚C
    • 178mm (7") colour LCD display with TFT technology
    • Interactive monitor with fully programmable menus and zoom function
    • Capture screen shots using a mere swipe of the finger
    • Live or user scheduled recording periods
    • Sampling rate adjustable from 1 second to 24 hours
    • Customisable audible and visual hi/lo point alarms
    • Organise alarms according to date or temperature/humidity values
    • MIN/MAX records track all 3 units of measurement
    • Save 20,000 points of data in CSV format
    • 16GB internal memory
    • Memory progress bar indicates percentage of space remaining
    • Field-replaceable probe attaches to table or RH550-C cable
    • Cables can be combined for extra length
    • USB port for an easy computer connection
    • Built in desktop stand
    • Wall mount bracket included
    • Rechargeable internal lithium polymer battery
    • 2 years warranty


    Extech part number: RH550

  • Specification

    Relative Humidity

    • Range: 10 to 95% RH
    • Max Resoultion: 0.1% RH
    • Basic Accuracy: ±2.5% RH

    Temperature (sensor directly attached to tablet)

    • Range: -10 to 40˚C (14 to 104˚F)
    • Max Resoultion: 0.1˚
    • Basic Accuracy: ±0.5˚C (±0.9˚F)

    Temperature (sensor attached to cable)

    • Range: -20 to 80˚C (-4 to 176˚F)
    • Max Resoultion: 0.1˚
    • Basic Accuracy: ±0.5˚C (±0.9˚F)

    Dew Point (calculated)

    • Range: -20 to 80˚C (-4 to 176˚F)
    • Max Resoultion: 0.1˚

    Internal Memory

    • Range: 16 GB

    Sample Rate

    • Range: 1 sec to 24 hrs

    Extension Cable

    • Range: Connect up to 3 cables (RH550-C)


    • Tablet: 198 x 118 x 25.7 mm (7.8 x 4.6 x 1 ")
    • Viewable Screen: 178 mm (7 ")
    • RH550-P probe: 79 x 15.8 x 10 mm (3.1 x 0.6 x 0.4 ")
    • RH550-C cable: 197 cm (~6.5 ft)
    • RH550-C cable + two end connectors: 210 cm (~6.9 ft)


    • Tablet: 365 g (12.9 oz)
    • Tablet with probe and cable: 435 g (15 oz)
    • RH550-P probe: 11.3 g (0.4 oz)
    • RH550-C cable: 47 g (1.7 oz)
  • Supplied Accessories

    • 1 x Extech RH550
    • 1 x Chart Recorder with built-in stand
    • 1 x Wall mount bracket
    • 1 x Detachable RH550-P probe
    • 1 x RH550-C Probe Cable (1.8m)
  • Product Documents

    Product Attachments

    View FileExtech RH550 Humidity and Temperature Chart Recorder Datasheet    Size: (403.63 KB)
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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:

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    • 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).

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