Humidity duct sensors

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Welcome at our website!

Our company is grounded at 1949 in Berlin Germany. The name Rüster stands for High Quality and Service since the start of the company.

Rüster develops and manufactures a wide range of sensors and transmitters for Industrial and HVAC proposes. With our new line of products we decided that it was time to show the world our Unique solutions for HVAC applications.

Our products are not only Innovative and High Quality but also excellent priced!

Rüster building controls is a part of Paul Rüster & Co GmbH

Paul Rüster & Co.GmbH

Paul Rüster & Co GmbH grounded in 1949 in Berlin Germany by Paul Rüster. Rüster is from the start of the company well known as developer and manufacture of innovative and High quality pressure transmitters, resistance thermometers for control of motors and generators, humidity sensing etc (with or without EX approval)

In our industrial delivery program there is a wide range of EX sensors and transmitters, sensors and transmitters special developed for sea going vessels, trains and offshore etc. All these solutions can be ordered with or without calibration!

Our success as a producing company is largely a function of how quickly it responds to new market requirments. Therfore our working methods are state of the art. In certain areas we cooperate closely with Universities, Institutes and partners.

Paul Rüster & Co GmbH is a ISO 9001 approved company.
Want to know more about our possibillitys and solutions? Contact our sales department for more information!

Rüster Duct Humidity sensors

Our program of duct humidity sensors is available in 2 differant housings. Our already proven Basic line housing and now also in our New Prime line housing. With the introduction of our Primeline housing a lot of new features have been integrated. The Primeline housing is available with Humidity, Carbon dioxide, Air Quality and last but not least wireless sensor technology! So one housing more options!

Duct sensor "Basic" line

KF Duct humidity sensor

Our KF range of duct humidity sensors supplied in our Basicline housing is designed to measure relative humidity with high accuracy. Optional the KF range of outdoor humidity sensors can be fitted with a acive or passive temperature output.


- High accuracy humidity +/- 2%

- Optional with temperature output

- 0..10Vdc or 4..20mA outputs available

- Housing with bajonet screws for easy installation

Type Rh Accuracy Price  
KF-U (0..10Vdc)
KF-I (4..20mA) 2%

Temperature output:

Active temperature output

Passive temperature output

Type Price   D.G.

Duct sensor "Primeline"

KRFT humidity & temperature sensor

The KRFT range of humidity and temperature sensors offer the latast technology high precision and accuracy RH & T element. The sensor is mounted in our new robust Primeline housing.The housing has an added benefit of being easy to install with the new hinged lid, witch can also be screwed closed to make the unit tamperproof. Optional the sensor can be supplied with a direct PTC/NTC sensing element, Large mulitiline bat LCD.  Output signals of 0..10Vdc, 0..5Vdc or 4..20mA (loop or externally powered) for all measured values of RH are available as standard. A custum output range for temperature can be requested between -20 and +50°C (-4 to +122°F).

Type Rh Accuracy Price  

KRFT-ENEnthalpy & Dewpoint

Type Price   D.G.
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GL certification is especially needed when used in Maritime environment

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Rüster Worldwide

We deliver Worldwide!

Ask our sales department about your possibility's!

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