Relative Humidity Data Loggers RH Data Loggers

AML Instruments have several Relative Humidity data loggers for you to choose. Competitively priced with an optional yearly calibration service plan with a traceable calibration certificate.

Our sales team has substantial experience providing temperature and relative humidity data loggers for numerous applications across multiple industries.

AML Instruments only sells temperature and humidity loggers with an outstanding record in reliability, accuracy, and product quality.

Our full range of RH Data Loggers is listed below, but if you have any questions or queries, then please do not hesitate to get in contact.

You can use our live chat in the bottom right-hand corner of this website.

Call Us on Tel: 01522789375

Or Email  [email protected]

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Full Range of Humidity Data Loggers For Sale

At AML Instruments, our relative humidity data loggers vary in price and specification, all focused on your business requirements.

If you require any information or assistance in choosing the correct relative humidity data logger, please get in touch with our sales team.

Here are some of the key features of the Testo loggers:

Measuring Range – 0 to 100 %RH

Accuracy – ±2 %RH (2 to 98 %RH) at +25 °C 

±0.03 %RH/K ±1 Digit 

< ±1 %RH / year drift at +25 °C

Resolution – 0.1 %RH

Data Transfer – Data SD card

Memory – 1,000,000 Readings

Measuring Rate – 10 secs – 24 hrs

Battery Life – 3 years at 15 min measuring rate at +25 °C 

Why Are Relative Humidity And Temperature Systems Used?

Their primary use is to monitor the air quality and comfort levels within an indoor space and log the data at set intervals. The data is transferable by USB cable, Wifi or SD card to a computer or mobile device where, using the correct software, you are able to analyse it.

A secondary use is to monitor ventilation systems or assess existing building moisture.

Where Are Humidity And Temperature Data Loggers Used?

Data loggers operate in various applications across multiple industries, such as:

Environmental Research

They are used to record climate change, weather patterns, seasonal changes and measure the temperature of our water systems. With their USB interface and rechargeable batteries, data loggers can be used in the field.

Energy Efficiency

From your home to schools to businesses, a humidity temperature data logger can record the readings at set intervals. The readings are often shown on an LCD display and could trigger an alarm if the reading falls outside of the set parameters.

Food Industry

Humidity and temperature measurements are critical for the food industry, as they prove that the food production has met the strict health and safety policies they must follow. Having recorded data provides evidence to the authorities and sellers.

The EC Directive 92/1 states that any business or organisation involved in the prep, storage or transportation of food must be able to prove that the RH and temperature levels have been maintained within the required parameters.


Temperature and humidity data loggers are critical for laboratories and the health care sector. For example, the World Health Organisation recommends that all vaccines be regularly monitored and kept within a temperature range of +2 to +8 °C during storage and transportation until administration. 


Monitoring the temperature and humidity through the cold chain, storage and transportation is essential to keep an organisation compliant with its HACCP. Having the combination of a temperature sensor and data storage in one device, a company can record and store the data, providing proof it has been compliant with its HACCP.


In the agriculture industry, the rearing of animals, growing fruit and vegetables, followed by storage and transportation, have to be undertaken under certain environmental conditions. An RH and temperature logger will monitor the environment and record the data. Proving predetermined conditions have been met and sustained.

Annual Calibration Service With Traceable Calibration Certificate

AML Instruments can supply and carry out your yearly calibration on RH data loggers. With four different calibration service options, there is one that will meet your requirements. If you have any questions or queries, then please get in contact.

You can use our live chat in the bottom right-hand corner of this website.

Call Us on Tel: 01522 789375

Or Email  [email protected]

Get In Touch

Whether you are searching for a data logger or a calibration service, we at AML instruments would love to hear from you.

If you require any further information or would like to discuss RH and temperature data loggers, you could either use our live chat (bottom right-hand corner, use our contact form or get in contact by phone.