GPT200 Piezoresistive Pressure Transducer
-0.1~100 MPa range · 4-20mA / 0-5V / 0-10V / RS485 (Modbus) output · 0.5% / 0.25% FS accuracy · 316L stainless steel · IP65-IP68 · Ex certified
Why Teams Standardize on the GPT200
Four practical reasons — not a spec sheet. Jump to quick specs →
-0.1~100 MPa covers vacuum, compound and high-pressure duties, so your equipment needs fewer spare models.
4-20mA, 0-5V / 0-10V and RS485 (Modbus) options match PLC, DCS, data loggers and wireless modules.
The diffused silicon core is isolated by a 316L diaphragm — only stainless steel touches water, gas, oil or chemicals.
≤1ms response with 0.5% / 0.25%FS accuracy and temperature-compensated calibration keep your process in control.
Built for Your Application
Find your working condition — the recommended configuration is shown next to it.
| Industry | What you're dealing with | How the GPT200 solves it | Recommended configuration |
|---|---|---|---|
| Hydraulics | Overload and pressure spikes are hard to catch; readings drift in a noisy plant. | 4-20mA output withstands long cable runs and interference; ≤1ms response captures pressure pulses. | 0-40 MPa · 4-20mA · 0.25%FS · G1/2 |
| Water Treatment | Outdoor pipelines get wet; pump discharge pressure fluctuates. | IP68 protection with a 316L diaphragm keeps working in washdown and submerged installations. | 0-1 MPa · 4-20mA or 0-5V · IP68 · 316L |
| Petrochemical | Hazardous area regulations rule out ordinary sensors. | Ex-certified version with a 316L diaphragm handles corrosive media in classified zones. | 316L diaphragm · Ex certified · 4-20mA |
| Irrigation | No convenient power supply outdoors; water hammer damages sensors on valve closure. | Low-power 3.3V supply with 0.5-2.5V output runs on battery/wireless; damped pressure port resists water hammer. | Low-power 0.5-2.5V · IP68 · damped port |
| Refrigeration | Refrigerant charge problems and leaks go unnoticed until performance drops. | Fast response catches pressure anomalies for alarm and shutdown logic in the control system. | Medium-low range · 4-20mA · 0.5%FS |
| Machinery | Many measurement points make point-to-point wiring expensive. | RS485 multi-point networking brings all sensors onto one bus into your monitoring platform. | RS485 (Modbus) · 316L housing |
Choose Your Transducer in 3 Steps
Start from your maximum working pressure and add a safety margin (1.5× is a common rule). Vacuum, compound and high-pressure ranges from -0.1 to 100 MPa are covered.
Long cable runs and electrical noise → 4-20mA. Battery or low-power systems → 0-5V / 0-10V. Networked monitoring → RS485 (Modbus).
G1/2, 1/4 NPT or a custom thread; DIN 43650 connector or direct cable. The protection rating follows the connection — up to IP68.
Which Sensing Technology Fits Your Project?
| Technology | Accuracy | Pressure range | Strength | Best for |
|---|---|---|---|---|
| Diffused silicon piezoresistive (GPT200) | 0.5% / 0.25%FS | Wide: -0.1~100 MPa | Best cost-performance, compact | Hydraulics, general industry, water treatment |
| Ceramic capacitive | 0.5% – 1%FS | Low to medium | Chemical resistance | Aggressive chemical and hygienic processes |
| Single crystal silicon | Up to 0.1%FS | Medium to high | Highest precision | Custody transfer and precision control |
Quick Specifications
| Parameter | Specification |
|---|---|
| Pressure range | -0.1 ~ 100 MPa (custom ranges available) |
| Pressure type | Gauge (G) / Absolute (A) / Sealed gauge (S) |
| Output signal | 4~20mA · 1~5V · 0~5V · 1~10V · 0~10V · RS485 (Modbus) |
| Accuracy | 0.5%FS standard · 0.25%FS optional · 0.1%FS (single crystal silicon) |
| Response time | ≤ 1 ms |
| Wetted parts | 316L stainless steel isolating diaphragm (oil-filled diffused silicon core) |
| Housing | Stainless steel 304 / 316L (optional) |
| Protection | IP65 / IP67 / IP68 (by electrical connection) |
| Pressure port | G1/2, 1/4 NPT or custom thread |
| Certification | CE, RoHS, Ex (explosion-proof) |
Full technical parameters
| Model | GPT200 Piezoresistive Pressure Transducer |
| Medium compatibility | Water, gas, air, oil, slightly corrosive liquids compatible with 316L |
| Long-term stability | Excellent, temperature-compensated calibration |
| Electrical connection | DIN 43650 Form A connector / direct cable |
| Supply (typical) | 24 VDC for 4-20mA; low-power 3.3V mode available for wireless systems |
| OEM options | Range, output, thread, connector, housing material, branding |
| Lead time | 7-15 working days for custom configurations |
Selection & Ordering Questions
How do I choose the right pressure range?
Start from your maximum working pressure and add a safety margin — 1.5× is a common rule. The GPT200 covers -0.1~100 MPa including vacuum and compound ranges, and custom ranges are available for OEM projects.
Which output signal should I choose?
4-20mA for long cable runs and high noise immunity; 0-5V or 0-10V for short-distance, low-power or battery systems; RS485 (Modbus) for digital communication and multi-point networking.
Gauge, absolute or sealed gauge — how do I choose?
Gauge (G) measures relative to atmosphere; absolute (A) gives altitude-independent readings referenced to vacuum; sealed gauge (S) is used when atmospheric pressure varies or the reference must be isolated.
What media can it measure?
Water, gas, air, oil and slightly corrosive liquids compatible with 316L stainless steel. The diffused silicon element is oil-filled and isolated, so only the 316L diaphragm contacts your medium.
Can it be used in hazardous areas?
Yes — Ex (explosion-proof) certified versions are available for hazardous areas such as petrochemical and gas installations.
What is the protection rating?
IP65, IP67 or IP68 depending on the electrical connection. IP68 versions suit outdoor, washdown and submersible installations.
What is the MOQ and lead time?
MOQ is flexible. Standard lead time for custom configurations is 7-15 working days.
Can I get a sample before placing a bulk order?
Yes. Samples are available for testing — send us your medium, range and output requirements and we will arrange accordingly.
Do you provide a calibration certificate?
Calibration certificates traceable to international standards are available on request — please specify when ordering.
Can you customize range, thread or output for our equipment?
Yes. OEM/ODM support covers pressure range, output signal, thread type, electrical connector and housing material, with quick prototyping.
Why Buy from GAMICOS
Pressure and level instrument production since 2008.
Exporting to the US, Germany, Russia, Saudi Arabia, India, Australia and more.
CE, RoHS, Ex, flameproof and CCS certifications.
Custom range, thread, connector and housing with quick prototyping.
Test samples and traceable calibration certificates on request.
Application engineers reply within 24 hours; flexible MOQ.
