Manufacturers
Handheld Hygrometers, Psychrometers & WBGTs
Measure relative humidity and ensure environments maintain a balanced ecosytem with our range of temperature, air and humidity meters. Also includes humidity and moisture sensors and relative humidity meters. Read More about Handheld Hygrometers, Psychrometers & WBGTs
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ETI 810-190 Pocket-Sized Hygro-Thermometer£25.20 £21.00- Dual capabilities - simultaneously measures air temperature and humidity
- Portable, handheld and pocket-sized design
- MAX/MIN measurement mode calculates maximum and minimum values over time
21 Reward PointsPrice Match Guarantee810-190 -
Extech 44550 Pocket Humidity/Temperature Pen£30.00 £25.00- Pen-shaped
- Measures RH and temperature at same time
- Pocket sized
25 Reward PointsPrice Match Guarantee44550 -
Extech 445580 Humidity/Temperature Pen£59.99 £49.99- 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
49 Reward PointsPrice Match Guarantee445580 -
Testo 605i Advanced Bluetooth Thermohygrometer Smart Probe£100.98 £84.15- Bendable probe head
- Bluetooth range: up to 100m
- Designed for use with a smartphone/tablet with the Testo Smart Probe App installed
84 Reward PointsPrice Match Guarantee0560260502 -
ETI 224-655 6500 Therma-Hygrometer with Fixed Remote Sensor£102.00 £85.00- Measures both temperature and humidity levels
- Flexible sensor attached via 1m PVC lead
- Calculate dewpoint, MAX/MIN temp/humidity and more
85 Reward PointsPrice Match Guarantee224-655 -
DiLog DL7102 Digital Humidity and Temperature Meter£129.60 £108.00- Digital meter capable of measuring temperature, humidity, dewpoint temperature and wet-bulb temperature
- Ideal for field work
- Compact, ergonomic design
108 Reward PointsPrice Match GuaranteeDL7102 -
Testo 610 Compact Humidity/Temperature Meter£131.58 £109.65- Measures both relative humidity and temperature
- Temperature range of -50 to 50°C
- Dewpoint/wet bulb calculation
109 Reward PointsPrice Match Guarantee5600610 -
Extech RH101 Hygro Thermometer + Infrared Thermometer£143.88 £119.90- Combination Humidity meter plus Infrared Thermometer features a super large backlit dual display
- Primary display is user selectable for IR or Humidity; Secondary always displays ambient temperature
- Infrared thermometer has built-in laser pointer and an 8:1 distance to target ratio
119 Reward PointsPrice Match GuaranteeRH101 -
Extech HT30 Heat Stress WBGT (Wet Bulb Globe Temperature) Meter£178.80 £149.00- Heat Stress Index measures how hot it feels when humidity is combined with temperature, air movement, and radiant heat
- Black Globe Temperature (TG) monitors the effects of direct solarradiation on an exposed surface
- In/Out Function displays the WGBT value with or without direct sun exposure
149 Reward PointsPrice Match GuaranteeHT30 -
Free UK DeliveryFluke 971 Temperature Humidity Meter£322.80 £269.00- Simultaneously measures humidity and temperature
- Also calculates dew point and wet bulb
- High accuracy
269 Reward PointsPrice Match GuaranteeFLUENV1 -
Free UK DeliveryExtech HT200 Heat Stress Wet Bulb Globe Temperature Meter£342.00 £285.00- Measures exactly how hot it feels outside using many different measurements
- Calculates wet bulb globe temp, black globe temp, air temp, relative humidity, dew point and wet bulb
- Memory storage for up to 50 readings
285 Reward PointsPrice Match GuaranteeHT200
About Handheld Hygrometers, Psychrometers & WBGTs
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, the 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 to ensure the safety of yourself and your workforce.
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:
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Component |
Temperature Effect |
Humidity Effect |
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Ceramic capacitors |
Changes in dielectric constant and capacitance lowered insulation resistance with high temp. |
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Electrolytic capacitors |
Increased electrolyte leakage; shortened life, a large change in capacitance, increased series resistance with low temp. |
Decreased insulation resistance increased dielectric breakdown increase in shorts |
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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 |
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Standard Connectors |
Flashover, dielectric damage |
Shorts fungus; corrosion of contacts lowered insulation resistance |
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Crystals |
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 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 it's 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.
