Thin-film sensor technology – high-precision sensor elements
As a pioneer in thin-film technology, we develop and manufacture high-precision pressure sensor elements to give you maximum design freedom.
With six self-contained product lines made from stainless steel, Inconel, or Hastelloy, we can handle temperatures up to 200 °C and harsh environmental conditions. Our custom industrial sensor solutions are perfectly validated for use in hydraulics, process gases, hydrogen, medical technology, and aviation & aerospace applications. Find the right product for your application here.
The demands placed on modern industrial pressure measurement technology don't leave any room for compromise: Extreme pressure ranges, aggressive media, demanding thermal loads, and restrictive installation spaces require sensor components that operate without any loss in performance. As a specialist in cutting-edge microtechnology, Siegert TFT manufactures highly precise sensor components for seamless integration into native systems. Our basic cells function as pure elementary sensors without any external active circuitry. They give development engineers and B2B decision-makers maximum freedom to design their own high-end industrial sensor solutions. Using cutting-edge microtechnology, we create the technological foundation for reliable thin-film sensors in challenging markets.
Whether it's in industrial hydraulics, process gas handling, cutting-edge hydrogen technology, medical technology, or in aviation & aerospace: wherever standard components fail, our advanced sputtering technology produces highly durable pressure sensor elements that set new standards in long-term stability and vibration resistance. Our precision thin-film sensors deliver exactly the reliability that modern industries demand. Discover the exact physical configuration that meets your specification requirements in this comprehensive model comparison.
Overview of thin-film sensors for industrial pressure measurement
PSP8-St and PSP10-St series (standard series)
The PSP8-St and PSP10-St series represent the tried-and-tested standard in industrial pressure measurement technology. These thin-film sensors, manufactured using advanced microtechnology on highly elastic stainless steel diaphragms, boast exceptional bridge accuracy and minimal sensitivity to climate conditions. The sensor elements can be connected using either soldering or bonding techniques, offering flexibility in the circuit design. As fundamental building blocks for advanced industrial sensor solutions, they guarantee the highest level of stability.
- Operating temperature: Designed for a thermal operating range of up to 125 °C.
- Measurement characteristics: Enables precise measurement of both static and dynamic pressures.
- Dimensions & design: Available in standard external diameters of 8.0 mm (PSP8-St) and 10.0 mm (PSP10-St), with a compact height ranging from 4.0 mm to 6.0 mm.
- Electrical specifications: Wheatstone bridge with a bridge resistance of 4 to 7 kΩ (standard resistance values at 5 kΩ).
- Precision: A minimal linearity error of < 0.5% FS (at nominal pressures ≥ 25 bar) or < 1.0% FS (at ≤ 16 bar), combined with a hysteresis of < 0.2% FS, ensures reliable measured data.
- Enhancements: An integrated PTC thermistor is optionally available as part of the circuit design.
PSP10-ET series (extended temperature range)
For environments where conventional components fail due to thermal overload, the PSP10-ET series offers the ideal solution. These highly thermally stable sensor elements are based on a specialised thin-film application on Inconel diaphragms. As extremely robust industrial sensor solutions, they can withstand continuous heat exposure in harsh industrial environments without any signal loss. Our thin-film sensor technology demonstrates its full performance capabilities even under extreme thermal stress.
- Operating temperature: Designed to withstand high thermal stress and specifically rated for continuous use at temperatures up to 200 °C.
- Material: High-strength diaphragm made of Inconel 718 for maximum strength in extreme conditions.
- Pressure ranges: A wide range of nominal pressure levels is available, from 10 bar up to 1,000 bar (available in 10/16/25/40/60/100/160/250/400/600 and 1,000 bar).
- Overload resistance: Designed for safe operation, featuring a mechanical overload capacity of 2 times the nominal pressure and a burst pressure of > 5 times the nominal pressure.
- Signal behavior: The rated output (FS) is 1.8 mV/V (with an output range of 1.4 to 2.3 mV/V) and a bridge resistance of 4 to 7 kΩ (base value: 5 kΩ).
- Dimensions: The external diameter measures 10.0 mm, with a height of 6.0 mm.
PSP8-SH and PSP10-SH series (extremely media-resistant)
This series provides a definitive solution to the typical challenges posed by highly corrosive media. When evaluating highly innovative materials, this measuring cell stands out due to its absolute chemical inertness. These highly media-resistant thin-film sensors can withstand even the most aggressive gases and liquids without compromising mechanical or electrical measurement accuracy. Manufactured using specialised microtechnology, these components set new standards.
- Material specification: A sensor cell featuring an extremely durable diaphragm made of Hastelloy C22.
- Main application areas: Ideal for use in oil and gas extraction, chemical plants, and maritime technology.
- Pressure ranges: Scalable for nominal pressures ranging from 16 bar, through to the 25...100 bar range, and up to high-pressure applications of 160...2,000 bar.
- Measurement performance: The output range is 1.4 to 2.5 mV/V, with a linearity error of less than 0.5% FS (at 25 to 100 bar) or less than 0.7% FS in the extreme high-pressure range.
- Sizes: Available in the tried-and-tested nominal diameters of 8.0 mm (PSP8-SH) and 10.0 mm (PSP10-SH).
PSP8-WL and PSP10-WL series (hydrogen-compatible)
Integration into modern, forward-looking energy systems requires materials that are completely diffusion-proof. The PSP8-WL/PSP10-WL series uses our specialised thin-film sensor technology to completely prevent damage caused by hydrogen molecule embrittlement. These highly advanced sensor elements offer B2B users maximum flexibility in circuit configuration directly from the factory.
- Material quality: A highly media-resistant stainless steel diaphragm made from 1.4435 (316 L) material is used to ensure maximum long-term stability against media-related effects.
- Application areas: Ideal for hydrogen applications, oil and gas extraction, maritime technology, and chemical plants.
- Pressure ratings: The pressure ranges are divided into three categories: ≤ 16 bar, 25 to 100 bar, and high-pressure levels > 100 bar.
- Signal parameters: Output range from 0.95 to 1.45 mV/V, with a highly stable zero signal of < ±0.2 mV/V.
- Configuration options ex works: The bridge resistance can be customised to meet customer requirements, ranging from 3.5 kΩ to 10 kΩ (standard: 4 to 7 kΩ). Additionally, special circuit configurations (e.g., open bridge), an integrable PTC temperature sensor (1,000 ohms), and an additional TC span compensation option are available.
- Sizes: Available in compact diameters of 8.0 mm and 10.0 mm, featuring pre-tinned external connections (cable or bondable).
PSF-St, PSF-HT, PSF-KL and PSF-FL (flush front) series
Absolute geometric precision is essential wherever viscous, crystallising, or particle-laden media are in motion. The PSF series offers flush-mounted and cylindrical pressure sensors for B2B applications, precisely tailored to your mechanical design specifications. Designed as a compromise-free, elementary sensor with zero dead space, it provides long-term protection against deposits when it comes to sensitive processes.
- Design flexibility: The pressure sensors are supplied according to the user's specifications, based on the measurement body requirements – either as discs made of metal alloys or as cylindrical measurement bodies with a metal diaphragm.
- Two technological versions are available:
- Oil-filled with corrugated diaphragm: This product features a diaphragm made of stainless steel 1.4435 / 316L, optimised for a pressure range of 4 to 600 bar. It is available in standard thread sizes of G ¼ inch and G ½ inch.
- Oil-free: Based on a stainless steel diaphragm made from 1.4548 / 17-4 PH material, designed for pressure ranges between 100 and 600 bar. The threaded connection is available in G ¼ inch as standard, or can be customised to meet specific customer requirements.
- Electrical contact: Versatile and flexible connections can be made using flex jumpers, individual wires, or custom special designs tailored to specific applications.
- Performance data: Integrated Wheatstone bridge with a resistance of 4 to 7 kΩ (standard value: 5 kΩ). The linearity error is < 0.5% FS at pressures above 4 bar.
