RS PRO RS-325A Digital Thermohygrometer, Max Humidity 99%RH

  • RS Stock No. 195-9129
  • Manufacturer RS PRO
Technical data sheets
Legislation and Compliance
Non Compliant
COO (Country of Origin): CN
Product Details

RS PRO RS-325A Digital Thermohygrometer

Introducing the RS PRO digital thermohygrometer. This high-quality thermal hygrometer is ideal for continuous monitoring and measurement of relative humidity (RH) and temperature for indoor climates. This lightweight and easy to use unit from RS PRO is a great instrument for monitoring the general indoor air quality and can also be used to keep an eye on problem areas for further investigation. The LCD display allows clear and accurate readings and the unit can be used for a variety of applications like observing ambient air temperatures in laboratories, especially during experiments, assessing indoor air quality (IAQ) or even just at home to maintain optimum comfort levels and good indoor air quality.

Features and Benefits:

• This digital thermohygrometer from RS PRO features a large LCD display and clear measurement parameters, allowing for easy reading of measurements
• By offering a built-in stand, it is easy to stand on desk areas or shelves for constant monitoring
• The compact unit offers a temperature from -10°C to +60°C and a hygrometer range 0 to 99% RH
• It is a dual-purpose Thermometer and Hygrometer which measures temperature and humidity, suitable for use in a variety of applications and is incredibly user-friendly
• The unit is powered by 2 1.5V AA batteries (included)
• Supplied with batteries and a convenient carry case for unit storage and protection


A thermohygrometer is an instrument that is used to measure temperature and relative humidity. It is an important tool to measure these two variables to ensure good air quality and optimum comfort levels. Proper humidity control can have a wide range of health benefits for people who suffer from skin problems, asthma, allergies, and much more. Some units are available as digital or analogue units and others can contain a probe for more detailed investigation and measurement in harder to reach areas. Thermohygrometers are invaluable for facility maintenance and utility technicians, HVAC-service contractors, and specialists who assess indoor air quality (IAQ) and are widely used at home, in schools, the workplace, hotels, storerooms and many more. The most common applications these units are used for are:

• Test and Measurement
• Industrial Maintenance
• Safety
• Metering
• Maintenance and Repair
• Facility Maintenance
• Temperature

Is this thermohygrometer suitable for outdoor use?

Yes, this is suitable for indoor use as well as outdoor use. It is advised that if the device is being used outdoors, it is used in sheltered areas only as water ingress from outdoor elements could damage the unit and compromise the accuracy.

What is a thermohygrometer?

A thermohygrometer device is a piece of equipment that measures humidity by measuring the water vapour in the air, as well as ambient temperature. It is a dual-purpose unit that can be used to measure and monitor the air quality of the surrounding areas.

What is the difference between a thermohygrometer and a moisture meter?

A thermohygrometer is a device that measures moisture in the immediate air where it is situated, whereas a moisture meter is a device that measures the moisture content held within an object, like a wooden panel, cardboard, etc.

Are calibrated versions of this device available?

Yes, RSCAL and UKASCAL certified devices are available here:
195-9513 RSCAL
195-9514 UKASCAL


RS PRO is our own brand range and brings you a wide range of high-quality, great value products offering you more choice. Trusted by engineers all over the world, every part of every RS PRO product has been rigorously tested against demanding industry standards; they’re only given the RS PRO seal of approval if we’re confident of their exceptional quality, which means you can be confident too.

Attribute Value
Maximum Humidity Measurement 99%RH
Temperature Measurement Resolution 0.1 °C, 0.1 °F
Best Humidity Measurement Accuracy ±4 %RH
Humidity Measurement Resolution 0.1%RH
Dewpoint Measurement No
Meter Type Digital
Printer No
Functions Measuring
Power Source Battery
Battery Type 1.5 V AA
Battery Life 7 → 8 month
Model Number p RS-325A
Temporarily out of stock - back order for despatch 10/03/2021, delivery within 6 working days from desptach date
Price Each
PHP 1,188.52
(exc. VAT)
PHP 1,331.14
(inc. VAT)
Per Unit
1 +
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