Hygrometers & Humidity Meters (80 Products)

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  1. ETI 800-125 Dial Room Hygrometer All ETI Products
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    ETI 800-125 Dial Room Hygrometer
    Rating:
    92%
    £3.42 £2.85
    • Measure the level of humidity in the air
    • Colour-coded zones for dry, moderate and humid
    • Free-stands on a surface or can be hung using the built-in hook
    4 Reward Points
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    SKU: 800-125
  2. ETI 810-145 Large Digit Temperature and Humidity Indicator All ETI Products
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    ETI 810-145 Large Digit Temperature and Humidity Indicator
    Rating:
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    • Dual screen constantly shows temperature and humidity levels
    • Large-size screen, easy to view from a distance
    • Can be placed on a desk or wall-mounted
    18 Reward Points
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    SKU: 810-145
  3. ETI 810-130 Temp/Humidity Monitor with Temperature Comfort Indicator All ETI Products
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    ETI 810-135 Temp/Humidity Monitor with Temperature Comfort Indicator
    Rating:
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    £11.70 £9.75
    • Constantly measures air temperature and humidity
    • Temperature comfort level indicator with colour-coded zones
    • Battery life of 10,000 hours
    18 Reward Points
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    SKU: 810-135
  4. ETI 810-130 Digital Temp & Humidity Monitor with Comfort Indicator All ETI Products
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    ETI 810-130 Temp/Humidity Monitor with Humidity Comfort Indicator
    Rating:
    90%
    £11.70 £9.75
    • Measures the humidity and temperature of the air and displays it constantly
    • Unique comfort level indicator shows at a glance how wet or dry the environment is
    • Exceptional battery life - 10000 hours on 2 x 1.5V AAA batteries
    18 Reward Points
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    SKU: 810-130
  5. ETI 810-140 Temperature & Humidity Monitor with Remote Probe All ETI Products
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    ETI 810-140 Temperature & Humidity Monitor with Remote Probe
    Rating:
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    • Constantly monitor temperature and humidity levels
    • Includes remote probe sensor attached via 3m lead
    • Accurate, reliable results
    20 Reward Points
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    SKU: 810-140
  6. ETI 810-180 Panel-Mount Temperature & Humidity Monitor All ETI Products
     
    ETI 810-180 Panel-Mount Temperature & Humidity Monitor
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    £18.00 £15.00
    • Install on a panel and constantly monitor temperature and humidity
    • Accurate, reliable results
    • Easy to install
    30 Reward Points
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    SKU: 810-180
  7. ETI 810-155 Therma-Hygrometer - Kit All ETI Products
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    ETI 810-155 Therma-Hygrometer with Alarm
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    £19.80 £16.50
    • Measures and displays relative humidity and temperature levels
    • Includes remote probe with alarm system when temperatures hit 0°C
    • Can be placed on a desk or wall mounted
    32 Reward Points
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    SKU: 810-155
  8. ETI 810-190 Pocket-Sized Hygro-Thermometer All ETI Products
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    ETI 810-190 Pocket-Sized Hygro-Thermometer
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    £21.00 £17.50
    • 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
    34 Reward Points
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    SKU: 810-190
  9. ETI 810-195 Temperature & Humidity Monitor with Low Temperature Alarm All ETI Products
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    ETI 810-195 Temperature & Humidity Monitor with Low Temperature Alarm
    Rating:
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    £21.60 £18.00
    • Dual display of temperature and humidity
    • Audible alert when temperatures below 0°C are detected
    • 3m flexible sensor supplied with wall bracket
    36 Reward Points
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    SKU: 810-195
  10. Extech 44550 Pocket Humidity Temperature Pen - Angled All Extech Products
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    Extech 44550 Pocket Humidity/Temperature Pen
    Rating:
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    £29.02 £24.18
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    • Pen-shaped
    • Measures RH and temperature at same time
    • Pocket sized
    48 Reward Points
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    SKU: 44550
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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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