Humidity Meters & Loggers

Q: What is a hygrometer?

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Q: What is humidity?

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Q: What humidity should a room be?

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Q: What is dew point?

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Q: Can I get a wireless humidity sensor for remote monitoring?

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Q: How do I know if my hygrometer is accurate?

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Hygrometers for precise humidity monitoring. Designed for offices, warehouses, agriculture, construction, and lots more.

Humidity monitoring is essential for preventing product spoilage in storage rooms and maintaining comfort for customers and staff in buildings. The ETI hygrometer range is designed for a wide range of applications.

Therma-hygrometers with large digital displays and colour-coded scales are ideal for offices, hospitals, schools, gyms, and other buildings where healthy conditions are critical.

Robust, handheld humidity meters are designed for portable spot checks in HVAC, construction, and agricultural processes, often featuring dew point calculation to help prevent condensation.

Humidity data loggers are designed for continuous environment monitoring and digital data storage. Ideal for museums, warehouses and other storage areas where 24/7 tracking is useful.

ETI Hygrometers for Reliable Measurements

Humidity meters, otherwise known as hygrometers, measure the quantity of water vapour in the air. Keeping humidity levels in check helps to maintain comfortable working and living environments whilst enabling safe storage of materials such as wood.

High indoor humidity can aggravate respiratory issues and trigger the spread of mould, bacteria and dust mites. Low humidity can cause irritated eyes and nasal passages.
A temperature and humidity meter is the best way to ensure conditions inside homes, offices, factories, and other workplaces are at a comfortable level.

ETI’s digital hygrometers offer clear, accurate indications of temperature and humidity, with available options for industrial applications and plants or greenhouses.

Why Humidity Monitoring Matters

Health & wellbeing

Supports comfortable breathing and helps reduce irritation from overly dry or humid air.

Product quality

Protects goods during production and storage, from food to pharmaceuticals to electronics.

Agriculture

Promotes healthy crop growth and helps prevent plant stress and disease.

Buildings & facilities

Helps prevent condensation, mould, damp, and structural damage in commercial environments.

Museums

Preserves artwork, documents, and artefacts by avoiding moisture-related deterioration.

Animal care

Helps maintain healthy living conditions and is crucial for breeding and incubation success.

Purpose-Built Humidity Sensors

ETI’s range of hygrometers is designed to make humidity monitoring accurate and easy for every type of application.

UK-made models

The ETI 6000 handheld humidity meter series and ThermaData humidity loggers are built to last in professional environments. They also come with a 2-year guarantee.

Remote probes

Our hygrometers with remote probes are ideal for monitoring inside incubators, laboratories, and hard-to-reach areas.

Large digital displays

Humidity meters, such as the Comfort Thermometer and Wall Mounted Thermometer, feature large, precise digital displays that make monitoring in buildings clear and easy.

Smart options

The ThermaData WiFi and ThermaData USB humidity loggers come with free software for digitising your humidity monitoring.

Frequently Asked Questions

What is a hygrometer?

A hygrometer is a device used to measure the amount of moisture in the air, usually expressed as relative humidity (%RH).

It helps monitor and control environmental conditions in settings such as homes, kitchens, warehouses, museums, and industrial processes, where humidity can affect comfort, product quality, and safety.

What is humidity?

Humidity is the amount of water vapour present in the air. It’s usually shown as relative humidity (%RH), which tells you how close the air is to being fully saturated with moisture.

What humidity should a room be?

For most homes and indoor spaces, the ideal humidity level is around 40–60 %RH. This range keeps conditions comfortable and helps reduce the risk of damp, mould, and dry air issues.

Learn how to increase or decrease humidity in a room in our humidity guide.

What is dew point?

Dew point is the temperature at which air becomes fully saturated with moisture, causing water vapour to condense into liquid water. When air cools to its dew point, you’ll see condensation form — such as dew on grass or droplets on cold surfaces.

Some hygrometers such as the ETI 6000 series have a dew point calculation function.

Can I get a wireless humidity sensor for remote monitoring?

Yes, the ETI ThermaData WiFi Humidity Logger lets you monitor room temperature and humidity remotely and receive digital alerts when readings fall outside your set limits.

The device measures the environment at timed intervals, sending readings to your computer via WiFi. It’s compatible with either the free ThermaData Hub software or the subscription-based ETI Cloud software.

How do I know if my hygrometer is accurate?

You can send your humidity meter to ETI’s UKAS-accredited calibration laboratory for testing and recalibration.

We will recalibrate the instrument to within its specified accuracy and return it to you with a fresh calibration certificate.

Regular calibration is important for maintaining accurate equipment and compliance standards.

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Humidity Meters & Loggers

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Digital Therma-Hygrometer | Comfort Indicator

Digital Therma-Hygrometer

Digital Comfort Thermometer | Climate Indicator

Digital Therma-Hygrometer | Dual Sensors

Max/Min Therma-Hygrometer | Frost Alarm

ThermaData® WiFi Humidity Logger

Wall Mounted Thermometer & Hygrometer

6000/6002 Therma-Hygrometers | Integrated Sensors

Pocket Therma-Hygrometer

6500 Therma-Hygrometer | Fixed Remote Probe

Therma-Hygrometer | Frost Alarm & Dual Sensors

6100/6102 Therma-Hygrometers | Interchangeable Remote Probes

Therma-Hygrometer - Panel-Mounting

ThermaData Humidity Logger with digital display

NODE WiFi Temperature & Humidity Sensor

HumidityPod USB Logger

Sintered Probe for 6100/6102 Therma-Hygrometers

Spare Probe for 6100/6102 Therma-Hygrometers