Strain gauge pressure sensor with a millivolt output direct from a four arm wheatstone bridge strain gauge circuit in pressure ranges from 10 up to 1000 bar gauge.
The TPS strain gauge pressure sensor utilises a robust stainless steel 17-4PH diaphragm with bonded foil strain gauges, and incorporates an innovative mechanical design which makes the sensor insensitive to tightening during installation.
The TPS strain gauge pressure sensor is ideally suited for applications that require high accuracy in dynamic pneumatic or hydraulic control & test systems, like material testing machines.
Product Parameters
- Pressure Ranges: from 10 up to 1000 bar (150 up to 15000 psi) gauge
- Accuracy: ±0.15% FSO typical for ranges above 200 bar, and ±0.25% FSO typical for ranges up to 200 bar
- Output Signal: 1.5 to 3 mV/V output sensitivity depending on range
- Process Temperature Range: -40…+120°C (-40…+248°F)
- Electrical Connections: Plug and cable options with IP65 to 67 protection rating
- Pressure Connections: BSP, NPT, UNF and metric threads, male or female
- Media Compatibility: Process fluids or gases must be compatible with INOX 17-4PH stainless steel.
Product Description
The TPS series is a highly accurate pressure transducer designed for engineering applications requiring ruggedness and reliability. Based on an extensimetric measurement principle using strain gauges on a metal base, it provides precise measurements ranging from 0…10 bar to 0…1000 bar (0…150 psi to 0…15000 psi). With wetted parts constructed from INOX 17-4PH stainless steel and a body made of INOX AISI 304 and Nylon 66GF35V0, it offers excellent durability. The sensor features an innovative mechanical structure that makes it completely insensitive to tightening torque during installation. It delivers a non-amplified analog mV/V output and offers an accuracy of up to ±0.15% FSO.
Sensing principle
The TPS strain gauge pressure sensor incorporates robust pressure sensor technology which includes a relatively thick 17-4ph stainless steel sensing diaphragm which is machined out of one piece of metal and high precision foil strain gauges which are precisely bonded to the reverse side to form a four arm wheatstone bridge circuit. The sensing element is mechanically designed in such a way to isolate it from mechanical stresses induced from tightening the pressure sensor during installation.
Pressure Ranges
The pressure ranges which run between 10 and 1000 bar can be over-pressured by up to two times their range without compromising specification tolerances.
Output Signal
The TPS precision pressure transducer has a mV signal output to provide a high dynamic signal response with passive circuitry.
Connections
A wide choice of pressure connections and electrical connections are available which make it possible to specify preferences for most installations.
Product Features
- Insensitive to installation tightening torque due to an innovative mechanical structural design.
- High precision accuracy up to ±0.15% FSO typical for measurement ranges exceeding 200 bar.
- Wide measurement capability ranging from 0…10 bar to 0…1000 bar.
- Durable INOX 17-4PH stainless steel wetted parts ensuring excellent fluid compatibility.
- Robust environmental resistance with IP65, IP66, and IP67 ingress protection options.
- Excellent long-term stability featuring a zero and span drift of less than 0.1% FSO per year.
- Infinite resolution achieved through an extensimetric strain gauge measurement principle.
- High vibration resistance up to 20 g maximum at 10-2000Hz according to IEC 60068-2-6.
Applications
Typically hydraulic methods are used to apply force or weight loading on a sample of material such as concrete or soil. When carrying out destructive testing high level pressure spikes are generated when samples start to weaken in reaction to the stresses being applied. It is important that the pressure sensor measuring the hydraulic pressure can tolerate this sudden change in pressure over many cycles without degradation of performance.
The TPS precision pressure sensor has a durable mechanical design and is used for high pressure material testing applications such as concrete or soil compression testing.
Installation & Operation Guide
Step 1: establish system grounding
Ensure that the transducer is properly grounded before operation. This is typically achieved by grounding the sensor directly through the machine body or the equipment upon which it is installed.
Step 2: separate signal and power cables
Route the cabling carefully to prevent electromagnetic interference. It is required to separate the power supply cables from the measurement signal cables during the installation process.
Step 3: connect the shielded cable
Utilize only a shielded cable for the electrical connections. The braiding on the connector side must be left floating, whereas the braiding on the instrument or PLC side must be connected to the power supply ground.
Step 4: verify the power supply
Provide the correct excitation voltage to the transducer. The sensor requires a typical power supply of 10 Vdc/ac RMS, but it can safely accept a maximum of up to 15 Vdc/ac RMS.
Step 5: mount the transducer
Install the transducer into the process connection without concern for over-tightening. The device features an innovative mechanical structure that makes it completely insensitive to tightening torque during this installation step.
Part Number Builder
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Product Help
Operating temperature limits
What is the operating temperature range for the transducer?
The transducer supports a process operating temperature range from -40 to +120 degrees Celsius, while the ambient temperature for the electronics part must not exceed 105 degrees Celsius.
Installation tightening torque sensitivity
Will over-tightening the sensor during installation impact its accuracy?
No, the transducer features an innovative mechanical structure that makes it completely insensitive to tightening during installation.
Transducer output signal type
What type of electrical output does this sensor transmit to a controller?
The transducer provides a non-amplified analog mV/V output signal.
Process fluid wetted materials
Which materials make up the wetted parts of the sensor?
The wetted parts of the transducer are constructed from INOX 17-4PH stainless steel, so the process fluid must be compatible with this specific material.
Cable shielding termination
What is the proper way to terminate the shielded cable during installation?
You must use a shielded cable where the braiding on the connector side is left floating, and the braiding on the PLC or instrument side is properly connected to the power supply ground.
R-Cal figure on calibration report
Why does the calibration report show that the sensors achieved 3mV/V output at 4,000 psi when they were rated for 5,000 psi at 3mV/V?
The calibration report lists a value of ~4000 psi, corresponding to ~80% of the sensor’s range. This indicates that instead of applying actual pressure for calibration, a resistor is added internally to the strain gauge bridge of the TPS pressure sensor. This resistor unbalances the bridge, simulating a specific output corresponding to ~80% of the full-scale range. This method of resistor-generated sensor calibration is called an R-Cal function. Therefore, the output sensitivity of ~3mV/V relates to the full-scale value of 5000 psi, while the value of ~4000 psi represents the simulated pressure generated by the R-Cal function.
Obsolete TFN replacement
We are looking for a replacement pressure transducer for our concrete cube compression strength test machine which measure a maximum force of 2000 kN. The old pressure sensor is marked TFN-V-7C, 700 bar, 3.0 mV/V.
The TFN is no longer manufactured, and we would suggest the TPS with the specification below as an alternative:
- SKU ID: s1-tps-96-28073
- Pressure Range: 0 to 700
- Units: bar
- Range Type: Positive Gauge (atm to +P)
- Output Signal: 3 mV/V
- Electrical Connection: 6 pin military style connector IP66
- Optional Mating Connector: 6 pin military style IP66 plus 2 metres of cable (C02W)
- Process Connection: G1/4 female
Hydraulic oil up to 700 bar
I need a hydraulic transducer for use on oil up to 700 bar with a 4 wire configuration which will operate from exciting 5V to 10V dc and output in mV.
The TPS is compatible with hydraulic oil and will work with any voltage between 5-10Vdc supply because it has a ratiometric input/output circuit, but bear in mind that the supply voltage will need to be stable to preduce a stable output.
- SKU ID: s1-tps-0001
- Part No: TPS-1-F-B07C-T 2130X000X00
- Pressure Range: 700
- Units: bar
- Range Type: Positive Gauge (atm to +P)
- Output Signal: 3 mV/V
- Electrical Connection: Integral shielded cable (1 metre long)
- Optional Mating Connectors: Not required
- Process Connection: G1/4 male (DIN3852-A)
Related Documents
Specification data sheet
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