Hygrometers & Humidity Meters (80 Products)

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  1. Extech RHT3 EzSmart Hygro-Thermometer - For iOS/Android All Extech Products
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    Extech RHT3 EzSmart Hygro-Thermometer - For iOS/Android
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    • Turns smartphones and tablets into a hygro thermometers
    • Works with free Extech app
    • Low cost
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    SKU: RHT3
  2. extech rh300 cal humidity calibration kit All Extech Products
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    Extech RH300 CAL Humidity Calibration Kit
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    SKU: RH300-CAL
  3. Extech 445580 Humidity Temperature Pen All Extech Products
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    Extech 445580 Humidity/Temperature Pen
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    • Simultaneous display of Temperature (°C/°F) and Relative Humidity
    • Max/Min and Data Hold
    • Built-in self calibration utility allows for field calibrations using optional Relative Humidity calibration bottles
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    SKU: 445580
  4. Extech RHT10 Humidity and Temperature USB Datalogger All Extech Products
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    Extech RHT10 Humidity and Temperature USB Datalogger
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    • 32,000 readings (16,000 for each parameter: Humidity/Temperature)
    • Selectable data sampling rate: 2s, 5s, 10s, 30s, 1m, 5m, 10m, 30m, 1hr, 2hr, 3hr, 6hr, 12hr, 24hr
    • Dew point indication via Windows° software (included)
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    SKU: RHT10
  5. Testo 608-H1 Thermohygrometer - Front All Testo Products
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    Testo 608-H1 Temperature & Humidity Monitor
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    • Constant monitoring of temperature, humidity and dewpoint
    • Large-size display
    • Suitable for any environment
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    SKU: 5606081
  6. Testo 605i Bluetooth Thermal Hygrometer Smart Probe/ Data Logger - Kit All Testo Products
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    Testo 605i Bluetooth Thermal Hygrometer Smart Probe/ Data Logger
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    • Measures both air humidity and air temperature
    • Bluetooth-enabled - wirelessly interfaces with smartphones and tablets allowing it to function as a data logger
    • Long-length sensor ideal for use in ducts
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    SKU: 05601605
  7. Testo 174H Temperature and Humidity Mini Data Logger All Testo Products
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    Testo 174H Temperature and Humidity Mini Data Logger
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    • Measure, monitor and record the air temperature and relative humidity surrounding sensitive goods
    • Equipped with long-life temperature and humidity sensors
    • Extensive memory with the capacity to store 16 000 readings
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    SKU: 05726560
  8. testo 605 h1 mini thermohygrometer in use All Testo Products
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    Testo 605-H1 Thermo-Hygrometer
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    • Long sensor probe for duct work
    • Measures ambient air temperature and humidity
    • Also calculates dew point
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    SKU: 5606053
  9. Testo 605-H2 Thermo-Hygrometer All Testo Products
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    Testo 605-H2 Thermo-Hygrometer
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    • Measures humidity, temperature and wet bulb
    • 4.9 inch probe
    • Swivel head for closing probe cap
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    SKU: 5606054
  10. ETI 224-655 6500 Therma-Hygrometer with Fixed Remote Sensor All ETI Products
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    ETI 224-655 6500 Therma-Hygrometer with Fixed Remote Sensor
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    • Measures both temperature and humidity levels
    • Flexible sensor attached via 1m PVC lead
    • Calculate dewpoint, MAX/MIN temp/humidity and more
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    SKU: 224-655
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About Hygrometers & Humidity Meters

Our environment is made of several different elements. While we generally think of oxygen, carbon dioxide and even nitrogen as forming the bulk of the Earth's atmosphere, water content in the air is also constantly present.  A good quality humidity tester is useful for those who routinely find themselves working in humid environments.

If you've got a lot of people working in one place, keeping the humidity in check is essential. Many people become uncomfortable in humid environments and can even suffer adverse health effects if they are exposed for long enough periods. Asthmatics are particularly affected by humid environments.

It is therefore important for you to regularly test the humidity of an environment in order to ensure the safety of yourself and your workforce. Tester's range of humidity testers come from industry-leading suppliers around the globe, providing excellent readings and testers that don't break the bank due to our low prices.

High humidity, along with temperature, also affects electronic circuits and machinery, so if you want to keep your installation working within safe limits a hygrometer will be a worthwhile investment. Here are some of the effects you can expect:

Component

Temperature Effect

Humidity Effect

Ceramic capacitors

Changes in dielectric constant and capacitance, lowered insulation resistance with high temp.

-

Electrolytic capacitors

Increased electrolyte leakage; shortened life, large change in capacitance, increased series resistance with low temp.

Decreased insulation resistance increased dielectric breakdown increase in shorts

Tantalum Capacitors

Electrolyte leakage; change in capacitance insulation resistance; series resistance

Decreased insulation resistance increased dielectric breakdown increase in shorts

Transistors

Increased leakage current; changes in gain; increases in opens and shorts

Increased leakage current; decreased current gain , if sealed not effect

Standard Connectors

Flash over, dielectric damage

Shorts fungus; corrosion of contacts lowered insulation resistance

Cyrstals

Drift

Drift

Switches

Oxidation of contacts

Contact arcing

Thermistors

Increased shorts and opens

Change in resistance

Humidity sensors are also quite commonly referred to as hygrometers. These devices are generally defined into two separate types - humidity meters and humidity sensors. The major difference between the two is that humidity meters are designed as handheld, portable instruments to be carried out and test various different applications; a humidity sensor is designed to be mounted in one location such as a wall and will constantly catalogue the humidity (and other parameters such as temperature) in the environment it is placed in.

A humidity sensor is an extremely beneficial tool in a wide variety of applications. Whether its simply maintaining the humidity levels in an office or ensuring that excessive water content isn't in the air when storing delicate materials such as wood, these sensors help to alert users when humidity is too high and action must be taken.

Many humidity meters include the ability to measure dewpoint, which is basically when water vapour in an area starts to condense into liquid water. By determining this value users can ensure that humidity in the air doesn't get the chance to turn into water, and this in turn increases safety and stops damage to properties and components.

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