KELLER Pressure GmbH
About us
KELLER Pressure – YOUR SWISS PRESSURE SENSING SPECIALIST
A market leader in the production of isolated pressure transducers and transmitters.
KELLER Pressure was established in 1974 by Hannes W. Keller, the inventor of the integrated silicon measuring cell. Today, his sons Tobias and Michael Keller run the business. The company is wholly family-owned and employs 480 staff.
KELLER Pressure feels a strong connection to its home of Switzerland. Its headquarters are where the value is added and where most of our employees work. As a result, all KELLER products bear the quality seal «Made in Switzerland» and embody the Swiss values of quality, functionality and reliability.
KELLER Druckmesstechnik AG, including KELLER Gesellschaft für Druckmesstechnik mbH in Jestetten, is certified to ISO 9001. This means that our measured values can be fully traced to national standards.
Products & services
H2-Manometer LEO-Record
The highly accurate, digital pressure gauge LEO-Record-H2 complements the hydrogen portfolio with a display and storage device, which can record pressure and temperature over a longer period of time. Due to the increased nickel content in the stainless steel, the device has a low embrittlement rate, which ensures a long service life. Thanks to its gold-plated membrane, H2 diffusion is reduced to a minimum. Via the RS485 interface, the pressure gauge can be easily connected to a computer to make configurations or read out the records. With its high accuracy and safety, the LEO-Record-H2 fulfils all requirements for measuring devices in the field of hydrogen.
H2 Pressure Transmitter 23SY
The 23SY-H2 series is characterised by its low embrittlement rate due to the increased nickel content in the stainless steel. Thanks to a gold-plated diaphragm, H2 diffusion is also reduced to a minimum. The pressure transmitters are compensated over the entire temperature range and offer excellent long-term stability. The 23SY-H2 series products are a reliable solution with long service life, high accuracy and safety to meet all hydrogen requirements.
H2 Pressure Transmitter 23SX
The 23SX-H2 series is characterised by its low embrittlement rate due to the increased nickel content in the stainless steel used. Thanks to a gold-plated diaphragm, H2 diffusion is also reduced to a minimum. Temperature dependencies and non-linearity are precisely compensated for by means of a mathematical model in the microcontroller. In addition to the digital RS485 interface, it is also possible to output the measurement results as a scalable analogue signal. The 23SX-H2 series products are a reliable solution with a long service life, high accuracy and safety to meet all hydrogen requirements.
ADT1-Tube
The remote data transmission unit ADT1-Tube is encased in a robust, stainless steel housing, which is ideally suited to installation in 2" monitoring pipes. The LoRa module, which can be configured on a country-specific basis, establishes a connection with the Internet and makes it possible to collect measurement data in a low-cost and energy-saving manner. The ADT1 is also available with an NB-IoT / LTE-M radio module. These autonomous devices can be linked with digital level sensors and pressure transmitters in the KELLER Pressure D and X product lines. With three conventional, high-quality AA batteries, the system can operate autonomously for up to 5 years. The LoRaWAN provider can be selected freely or an in-house or open source infrastructure and associated services can be used. The easiest and most convenient way to access the collected data at the end of the transmission chain is via PressureSuite Cloud from KELLER Pressure.
Serie PD-23X differential pressure transmitters
The differential pressure transmitters of the PD-23X series are suitable for 'wet/wet' applications. They have a single silicon diaphragm in their interior, which is pressurised from both sides and measures the pressure difference directly. This design enables them to measure small pressure differences even at an extremely high line pressure. The transmitters use digital compensation with a mathematical model to achieve high accuracy of 0,1 %FS.
IO-Link Transmitter 21Zio
The compact pressure transmitters of the 21Zio series can be used either as a pressure measuring instrument or as a pressure switch. Thanks to the universal IO-Link interface according to IEC 61131-9, the sensor is flexible and easily and quickly integrable into intelligent automation and other systems. The switching functions and other parameters can be called up and configured directly via IO-Link. In this way, machine downtimes are reduced to a minimum and personnel are relieved.
Series PD-33X differential pressure transmitters
The differential pressure transmitters of the PD-33X series are suitable for 'wet/wet' applications. They have a single silicon diaphragm in their interior, which is pressurised from both sides and measures the pressure difference directly. This design enables them to measure small pressure differences even at an extremely high line pressure. The transmitters use digital compensation with a mathematical model to achieve exceptional accuracy of 0,05 %FS – in the temperature range from 10 to 40 °C, this value even corresponds to the total error band.
CANOpen Transmitter 23SXc
In the 23SXc series high-precision pressure transmitters, temperature dependencies and non-linearity are precisely compensated for by means of a mathematical model in the microcontroller. With the CANopen interface, KELLER Pressure offers a highly accurate pressure transmitter that is optimally suited for a wide variety of automation solutions. The fully welded construction without internal seals is suitable for dynamic applications. Only stainless steel is in contact with the media.
IO-Link Transmitter 25SXio flush with front
High-precision piezoresistive pressure transmitters with front-flush metal diaphragm and IO-Link interface in Class 0,1% Features • IO-Link interface compliant with IEC 61131-9 • Various process data formats • Can be used as a pressure switch • Easy connection to the bus system via IO-Link master • high precision • Excellent long-term stability Technology • Insulated and encapsulated piezoresistive pressure sensor chip • Front-flush, seamless design with no internal seal • High-quality pressure transducer and tried-and-tested mathematical compensation Typical applications • Automation technology • Hydraulics and pneumatics • Industrial applications • Food industry • Biotechnology • Pharmaceutical industry • Chemical industry
IO-Link Transmitter 23SXio
23SXio Series High-precision, piezoresistive pressure transmitters with metal diaphragm and IO-Link interface in Class 0,1%FS Special Features • IO-Link interface according to IEC 61131-9 • Various process data formats • Can be used as a pressure switch • Easy integration into the bus system via IO-Link master • high precision • Excellent long-term stability Technology • Piezoresistive pressure sensor chip, isolated and encapsulated • Design without internal seal • High-quality pressure transducer and proven mathematical compensation Typical Applications • Automation technology • Hydraulics and pneumatics • Industrial applications • Food industry • Biotechnology • Pharmaceuticals • Chemical industry
News
Hydrogen – fuel of the future?
Materials that come into contact with hydrogen must therefore meet particularly stringent requirements. This fact is what gives pressure transmitters manufacturers one of our biggest collective headaches.
PORE-WATER PRESSURE MONITORING IN ICE-RICH PERMAFROST
Mountain permafrost and rock glaciers
CO2 RECYCLING
Removing CO2 from the air is difficult. Achieving this with an efficient benefit–cost ratio is pioneering work.