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Your Swiss Pressure Sensing Specialist

Europe’s leading manufacturer of isolated pressure transducers and transmitters
Pressure ranges from 5 mbar to 2000 bar
High volumes at low prices, great flexibility, highest accuracies
Production of more than one million pressure transducers and transmitters per year
KELLER is certified according to ISO 9001:2008

KELLER AG für Druckmesstechnik, headquartered in Winterthur (Switzerland), is Europe’s leading manufacturer of isolated pressure transducers and transmitters. The company, which has a global workforce of around 400 employees, was founded in 1974 by Hannes W. Keller, a graduate in physics and the inventor of the integrated silicon measuring cell. The entire value creation, from production of the individual parts and calibration of the sensor through to the final inspection of the finished products, takes place at the headquarters in Winterthur. All KELLER AG products are therefore “Made in Switzerland”.

KELLER AG piezoresistive pressure sensors have impressively high precision and pressure ranges from 5 mbar to 2000 bar. In addition to more than 500 standard products, the company also develops and produces numerous customised solutions. Using state-of-the-art, automated manufacturing processes, large runs of industrial OEM transducers as well as special design versions in very small quantities are produced in more than 35 highly-specialised machining islands, resulting in more than one million pressure transducers and transmitters per year. The high quantities mean that we can keep prices low despite complex production processes and stringent quality requirements.

The KELLER AG product range includes digital manometers, level probes, data loggers, remote transmission units and pressure calibrators. Digital display equipment completes our wide range. The application areas for our pressure transducers are just as broad as our product range. For example, they regulate the internal cabin pressure in aircrafts, ensure the smooth switchover from natural gas to petrol in hybrid vehicles and are used as reference sensors in laboratory technology. KELLER special sensors, such as modular pressure catheters and other miniature transducers, are especially popular among researchers.

KELLER AG für Druckmesstechnik, including KELLER Ges. für Druckmesstechnik mbH Jestetten, is certified to ISO 9001:2008. The traceability of the measurement variables to national standards is therefore ensured.

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نسخه متنی

Ultra-Fast Miniature Pressure Transducer

Series M5

bandwidth 50 khz / resistant up to 200 °c

The piezoresistive pressure transducers Series M5 are ideal, thanks to the M5 fine thread, for
taking measurements at close proximity in places where access is a problem and in very thin
pipes – exactly the kinds of conditions associated with engine test benches. The front-flush
design prevents gas bubbles interfering with fluid measurements and supports measurements
up to 200 °C without a cooling adapter. The extreme dynamic range of 0…50 kHz makes it
possible to record very fast pulsations just as reliably as those associated with static pressure
values. A vibration-resistant Teflon FEP cable (IP67) ensures the 80 mV output signal is routed
securely out of the hot environment and then onwards for processing.
Sensor technology
The Series M5 sensor incorporates a stable silicon sensor which is backside-soldered directly
to a supporting element designed for excellent fluid dynamics. This construction eliminates the
disadvantages of sealants, adhesives, separating membranes or capillary tubes in high temperature environments. The practically-flush connection to the measurement media is critical
to the excellent dynamic range of 0…50 kHz. The micromechanical design delivers absolute
measuring ranges of 3, 10 and 30 bar, overpressure protection of up to 5 times measuring range
and effective isolation of mounting forces, and a very low dead volume.
Conditions of use
Thanks to the materials used in the pressure connection (silicon oxide, stainless steel, and
gold), the pressure transducers in the M5 series offer excellent media compatibility. They are
designed for operating temperatures between -50 °C and +180 °C and come with a typical output signal range of 80 mV (based on a 1 mA supply) and an individual calibration certificate. The
unit which incorporates a remote measurement amplifier is known as the Series M5 HB (see the
data sheet) and can achieve a total error band of ± 1 %FS for the operating temperature range.
Performance characteristics
• Sensor head capable of exposure to 200 °C
• Broad compensated temperature range, with a choice of either -20…125 °C or -40…180 °C
• Excellent dynamic response, up to 50 kHz (pulsation measurements)
• Insensitive to structure-borne vibration
• Extremely compact design, pressure connection: M5 x 0,5 fine thread
• Teflon FEP cable with IP67 ferrule, suitable for use on test benches
• Pressure ranges of 3 bar, 10 bar and 30 bar (absolute)

ELECTRICAL CONNECTIONS

1,5 m

+IN / TOB (black)

+OUT (red)

Measurement Bridge

-OUT (blue)
-IN (white)
1:1

Shield (wire mesh)
Comments
-t The R1 or R2 resistor provides pre-compensation for the zero-point variation
t with temperature. The recommended value can be found in the calibration sheet.
-t The shield is not connected to the pressure transducer housing.
-t Recommended tightening torque 1,5…2,5 Nm

Subject to change without notice

KELLER AG für Druckmesstechnikt

KELLER Ges. für Druckmesstechnik mbHt
Company certified to ISO 9001

06/2014

St. Gallerstrasse 119t

Schwarzwaldstrasse 17t

CH-8404 Winterthurt
D-79798 Jestettent

Tel. +41 (0)52 - 235 25 25t

Tel. +49 (0)7745 - 9214 - 0t

Fax +41 (0)52 - 235 25 00

Fax +49 (0)7745 - 9214 - 60
www.keller-druck.com

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