Skip to content
  • We specialise in Test and Measurement - Come to us for best advise, competitive pricing and fast delivery
rapid-tech nzrapid-tech nz
  • HOME
  • MANUFACTURERS
    • –
      • FLIR
      • ALL-TEST Pro
      • CEM
      • Coantec
      • CYBERTEK
      • Entec Solar
      • Electro-PJP
      • Extech
      • GW Instek
      • HIOKI
    • –
      • HIKMICRO
      • IDEAL Electrical
      • Kyoritsu
      • Magnum Pro
      • Martindale Electric
      • MeasureSafe
      • Memie
      • Presys Instruments
      • Prova
      • Reed
    • –
      • Sefram
      • SEW
      • Socket & See
      • TEKBOX
      • Tvb Tech
      • TREND (IDEAL NETWORKS)
      • Tenmars
      • UNI-T
      • UNI-T Instruments
      • Yokogawa
  • PRODUCTS
    • –
      • Accessories
      • Acoustic Imaging
      • AC Power Source
      • Air Quality
      • Air Flow/Anemometers
      • Automotive
      • Battery Testers
      • Borescopes
      • Calibrators
      • Carbon Monoxide
      • Clampmeters
      • Cable/Pipe Locators
      • Cable Testers
      • Combo Kits
      • Component Test
    • –
      • Current Clamp/Probe
      • DATA / NETWORK
      • Data Acquisition System
      • Dataloggers
      • DC Power Supplies
      • Distance
      • Electrical Tester
      • EMI/EMC Pre-Compliance
      • EMR/ELF Meters
      • Food Safety
      • Force
      • Ground/Earth Testers
      • Hipot Testers
      • Humidity
      • Hunting
    • –
      • HV Cable Test
      • Infrared imager
      • Installation Safety Testers
      • Intrinsically Safe
      • Insulation Testers
      • IR Thermometers
      • IR Windows
      • LCR Meter
      • Loop Tester
      • Light/LUX Meters
      • Magnetic Meter/Detector
      • Manometers
      • Micro/Milliohm Meters
      • Moisture Meters
      • Multimeters
    • –
      • Non Contact Voltage Testers
      • Optical Spectrum Analyzers
      • Oscilloscopes
      • OTDR
      • pH
      • Particle Counter
      • Phase Angle Meter
      • Phase Rotation
      • Portable Appliance Tester
      • Power Measurement/Quality
      • Pressure Pumps
      • Process Tools
      • RCD Tester
      • Recorders
      • Refractometer
    • –
      • Safety Testers
      • Signal Generators
      • Solar (PV) Measurement
      • Sound Level
      • Spectrum Analyzers
      • Stroboscope
      • Tachometers
      • Test Leads/Probes
      • Thermometer
      • Thermal Imagers
      • Thermal Imaging Multimeters
      • Thickness
      • Ultrasonic Leak Detector
      • Vibration
      • Water Quality
  • FLUKE
  • FLIR
  • YOKOGAWA
  • NEW PRODUCTS
  • INDUSTRIES
    • –
      • Electrical
      • Building & Pest Control
      • Construction
      • Data & Network
      • Food & Process / Industrial
      • Heating, ventilation, and air conditioning
      • Metrology
      • Plumbing & Gas
      • RF Test / EMC
      • Solar PV
      • Transport
  • Contact
  • 03 741 4222
Extech RH250W
Extech / Thermometers

Extech RH250W | Hygro-Thermometer with Connectivity to ExView® App

  • AN250W
  • Extech CO230 Indoor Air Quality, Carbon Dioxide (CO2) Monitor

Extech logo

Easily measure, transmit, and share data wirelessly from a mobile device via the ExView app in addition to reporting Max and Min readings, and viewing data on both the bright, backlit Extech RH250W LCD display and from the ExView app on iOS® or AndroidTM mobile devices.

PDF Download icon RH250W Datasheet

Categories: Air Quality, Environmental, Environmental Testers, Extech, Thermometers Tags: Air Quality, Hygro-Thermometer Brand: EXTECH
  • AN250W
  • Extech CO230 Indoor Air Quality, Carbon Dioxide (CO2) Monitor

You may also like…

  • AN250W Extech AN250W | Anemometer with Connectivity to ExView® App
  • Extech LT250W Extech LT250W | Light Meter with Connectivity to ExView® App
  • Extech RPM250W Extech RPM250W | Laser Tachometer with Connectivity to ExView® App
  • Extech SL250W Extech SL250W | Sound Meter with Connectivity to ExView® App
Recently Viewed Products
  • Yokogawa DL350 Portable ScopeCorder Yokogawa DL350 Portable ScopeCorder
  • Hioki L2020 Right Angle Test Lead Set for Battery Applications | Designed for the BT3554 and RM3548 Hioki L2020 Right Angle Test Lead Set for Battery Applications | Designed for the BT3554 and RM3548
  • Extech RF11 Portable Sucrose Brix Refractometer (0 to 10%) with ATC Extech RF11 Portable Sucrose Brix Refractometer (0 to 10%) with ATC
  • YOKOGAWA AQ1200 OTDR YOKOGAWA AQ1200 Compact Optical Domain Reflectometer
  • GW Instek GLN-5040A Line Impedance Stabilisation Network GW Instek GLN-5040A Line Impedance Stabilisation Network
  • Description
  • Additional information
  • Specifications

Monitoring relative humidity and temperature from a mobile device at the same time

Using the free ExView app, the Extech RH250W is a compact digital hygro-thermometer with Bluetooth® connectivity, allowing building and maintenance professionals to view and share relative humidity and temperature data directly from their mobile devices. With the capability to gather data and display trends, set visual and audible alarms, and send reports, users can gain a deeper understanding of equipment and building health.

Features

  • Measure relative humidity and air temperature simultaneously
  • Transmit, view, and share data directly from a mobile device via Bluetooth connection to the ExView app
  • Record Max/Min readings
  • Freeze display with ‘Data Hold’
  • Save battery life with Auto Power Off feature
  • Mount on tripod with standard 1/4″-20 mounting screw
  • View data on both the bright, backlit RH250W LCD display and from the app on iOS® or Android™ mobile devices (offers both day mode and dark mode)
  • Connect up to eight compatible Extech Connected 250W Series meters to the app simultaneously
  • Set up data recording and program high/low audible alarms through the app
  • Export data in .CSV file format or send PDF reports—including photos of the measurement location—from the app
  • Comes complete with 3 AAA (1.5 V) batteries

 

ExView® App Enables Remote Data Collection and Reporting With Multiple Devices

ExView App

Extech has launched a new mobile app that will make data collection and analysis easier than ever before with its 250W-Series of environmental meters – the ExView App. This app allows you to monitor a variety of environmental conditions from outside safe or hard-to-reach areas. It connects with up to eight meters at once. You will be able to monitor key readings throughout your facility and easily share them with your team whether you’re using several LT250W light meters, AN250W aneometers, or other new 250W-Series meters.

ExView® App

ExView® AppExView® App

With the ExView App, you are able to read and log measurements remotely in real time. In addition, you can create detailed PDF reports that can be shared and saved. When you connect your meters to a mobile device, you can easily collect data, create graphs, and add information to customer reports. Also, you can use your smartphone or tablet for remote viewing in difficult-to-access areas or for sharing results with others.

 

Integration With the Extech W Series

Extech W Series meters that include Bluetooth® connectivity were designed for seamless integration with the ExView App. In addition to displaying trends, setting alarms, creating and sending reports, users can gather deeper insights on equipment and building health.

ExView® App

 

Weight 3 kg

Specifications

Specifications Range Max Resolution Basic Accuracy
Relative Humidity 0 to 100% RH 0.1% RH ±5% RH
Air Temperature -10 to 60°C (14 to 140°F) 0.1°C (0.2°F) ±1.0°C (±2.0°F)
Response Time 1 sec
Connectivity Bluetooth (Free ExView App)
ExView App Compatibility iOS 13.0 and higher & Android 9.0 and higher
Transmission Distance <10 m up to 90 m line of sight
Power 3 x AAA (1.5 V) battery (included)
Operating Conditions 0 to 40°C (32 to 104°F), ≤80% RH
Dimensions 5.9 × 2.1 × 1.1 in (150 × 53 × 28 mm)
Weight 2.8 oz (80.5 g)

RAPID TECH EQUIPMENT LIMITED

NZBN: 9429052064210

CHRISTCHURCH OFFICE

PO Box 1785
Christchurch 8140

37 Dormer Street
Papanui
Christchurch 8053

Phone:  03 741 4222

Contact:  Jim Day
Mobile:  027 700 0178
email: jim@rapid-tech.co.nz

Australia

MELBOURNE OFFICE


Raj — Flir / Fluke / Kyoritsu / HT Italia / Yokogawa / TVBTech / Coantec

Phone: +61 3 9763 3299
Mobile: +61 448 877 139
email: raj@rapid-tech.com.au


Mark — Keysight / GW Instek / Rohde&Schwarz / Yokogawa / Tekbox

Phone: +61 3 9763 3299
Mobile: +61 407 775 003
email: mark@rapid-tech.com.au


Jasdev — Fluke / Metrel / Kyoritsu

Phone: +61 3 9763 3299
Mobile: +61 493 297 615
Email: jas@rapid-tech.com.au

SYDNEY OFFICE


Jason — Yokogawa / Guildline / Cybertek / Meatest

Phone: +61 2 9600 6120
Mobile: +61 484 944 050
email: jason@rapid-tech.com.au


Peter — Flir / Fluke / HT Italia / Kyoritsu / Metrel

Phone: +61 2 9748 8699
Mobile: +61 413 349 874
email: peter@rapid-tech.com.au


Mark Isherwood — Keysight / Rohde&Schwarz / GW Instek / Pendulum / Tekbox

Mobile: +61 431 201 871
email: mark.isherwood@rapid-tech.com.au

BRISBANE OFFICE


Heath - Flir / Fluke / Kyoritsu / HT Italia / Yokogawa / Radiodetection

Phone: +61 7 5547 0698
Mobile: +61 434 348 554
email: heath@rapid-tech.com.au


Ryan — Keysight / Rohde&Schwarz / GW Instek / Pendulum / Tekbox

Mobile: +61 493 432 933
email: ryan@rapid-tech.com.au


ADELAIDE OFFICE

Kim
Phone: +61 3 9763 3299
email: kim@rapid-tech.com.au

PERTH OFFICE


Chris
Phone: +61 8 9248 6688
Mobile: +61 488 835 853
email: sales@rapid-tech.com.au

DARWIN OFFICE 


Chris
Phone: +61 8 9248 6688
Mobile: +61 488 835 853
email: sales@rapid-tech.com.au

AUSTRALIA WIDE


Holly — Calibration and Service Coordinator
Phone: +61 3 9763 3299
email: holly@rapid-tech.com.au

 

  • Manufacturers
  • Popular Products
  • Contact
  • Power Measurement/Quality
  • Test Leads/Probes
  • Optical Spectrum Analyzers
  • IR Windows
  • Outdoor
Copyright 2026 © Rapid-Tech Equipment Limited.
  • HOME
  • MANUFACTURERS
    • –
      • FLIR
      • ALL-TEST Pro
      • CEM
      • Coantec
      • CYBERTEK
      • Entec Solar
      • Electro-PJP
      • Extech
      • GW Instek
      • HIOKI
    • –
      • HIKMICRO
      • IDEAL Electrical
      • Kyoritsu
      • Magnum Pro
      • Martindale Electric
      • MeasureSafe
      • Memie
      • Presys Instruments
      • Prova
      • Reed
    • –
      • Sefram
      • SEW
      • Socket & See
      • TEKBOX
      • Tvb Tech
      • TREND (IDEAL NETWORKS)
      • Tenmars
      • UNI-T
      • UNI-T Instruments
      • Yokogawa
  • PRODUCTS
    • –
      • Accessories
      • Acoustic Imaging
      • AC Power Source
      • Air Quality
      • Air Flow/Anemometers
      • Automotive
      • Battery Testers
      • Borescopes
      • Calibrators
      • Carbon Monoxide
      • Clampmeters
      • Cable/Pipe Locators
      • Cable Testers
      • Combo Kits
      • Component Test
    • –
      • Current Clamp/Probe
      • DATA / NETWORK
      • Data Acquisition System
      • Dataloggers
      • DC Power Supplies
      • Distance
      • Electrical Tester
      • EMI/EMC Pre-Compliance
      • EMR/ELF Meters
      • Food Safety
      • Force
      • Ground/Earth Testers
      • Hipot Testers
      • Humidity
      • Hunting
    • –
      • HV Cable Test
      • Infrared imager
      • Installation Safety Testers
      • Intrinsically Safe
      • Insulation Testers
      • IR Thermometers
      • IR Windows
      • LCR Meter
      • Loop Tester
      • Light/LUX Meters
      • Magnetic Meter/Detector
      • Manometers
      • Micro/Milliohm Meters
      • Moisture Meters
      • Multimeters
    • –
      • Non Contact Voltage Testers
      • Optical Spectrum Analyzers
      • Oscilloscopes
      • OTDR
      • pH
      • Particle Counter
      • Phase Angle Meter
      • Phase Rotation
      • Portable Appliance Tester
      • Power Measurement/Quality
      • Pressure Pumps
      • Process Tools
      • RCD Tester
      • Recorders
      • Refractometer
    • –
      • Safety Testers
      • Signal Generators
      • Solar (PV) Measurement
      • Sound Level
      • Spectrum Analyzers
      • Stroboscope
      • Tachometers
      • Test Leads/Probes
      • Thermometer
      • Thermal Imagers
      • Thermal Imaging Multimeters
      • Thickness
      • Ultrasonic Leak Detector
      • Vibration
      • Water Quality
  • FLUKE
  • FLIR
  • YOKOGAWA
  • NEW PRODUCTS
  • INDUSTRIES
    • –
      • Electrical
      • Building & Pest Control
      • Construction
      • Data & Network
      • Food & Process / Industrial
      • Heating, ventilation, and air conditioning
      • Metrology
      • Plumbing & Gas
      • RF Test / EMC
      • Solar PV
      • Transport
  • Contact
  • Login
  • Newsletter
  • 03 741 4222

Login

Lost your password?