Product Overview
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The miniature pressure transmitter is a precision analog pressure measurement device designed for applications where space is limited and reliable performance is essential. It utilizes a piezoresistive pressure sensing element with a stainless steel isolation diaphragm, which converts applied pressure into an electrical signal. The signal is processed by an integrated compensation circuit and output as a ratiometric 0.5–4.5V voltage signal.
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The transmitter features full temperature compensation from -30°C to +65°C, ensuring stable and accurate pressure readings regardless of ambient temperature variations. The all-welded stainless steel construction provides excellent media compatibility, allowing the device to measure a wide range of liquids and gases compatible with 316L stainless steel. The G1/4 male thread pressure connection and cable or connector electrical termination offer flexible installation options.
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With its small size, light weight, and 5V DC supply requirement, this miniature pressure transmitter is ideal for integration into test and measurement equipment, industrial automation systems, automotive applications, and any scenario where traditional large-form-factor transmitters cannot be accommodated.
Product Advantages
Ultra-Compact Design: Small footprint and low weight enable installation in tight spaces and portable equipment without compromising performance.
Wide Operating Temperature Range: Compensated from -30°C to +65°C with total error as low as ±1% FS, ensuring accuracy across diverse environmental conditions.
Ratiometric Voltage Output: 0.5-4.5V ratiometric output scales with the 5V supply, providing excellent noise immunity and compatibility with standard ADC inputs.
Media Compatibility: 316L stainless steel isolated diaphragm and all-welded construction allow measurement of corrosive liquids and gases compatible with stainless steel.
High Overpressure Capability: 1.5× full-scale overpressure and 3× full-scale burst pressure ratings provide robust protection against pressure spikes.
Long-Term Stability: ±0.2% FS per year ensures consistent, drift-free performance over extended periods, reducing recalibration frequency.
Versatile Integration: Available with cable or 4-pin connector electrical termination and G1/4 pressure port for flexible system integration.
Specifications
| Measurement Principle | Piezoresistive (stainless steel isolated diaphragm) |
| Pressure Range | 0 ~ 4MPa (Absolute) – custom ranges available |
| Pressure Type | Absolute (Gauge & Sealed Gauge available upon request) |
| Overpressure | 1.5× full-scale pressure |
| Burst Pressure | 3× full-scale pressure |
| Output Signal | 0.5V ~ 4.5V DC (ratiometric, 3-wire) |
| Supply Voltage | 5V DC (maximum excitation current ≤ 6mA) |
| Load Resistance | ≥ 10kΩ |
| Total Error Band | ±1.5% FS (-30°C ~ -10°C), ±1% FS (-10°C ~ 50°C), ±1.5% FS (50°C ~ 65°C) (Includes nonlinearity, hysteresis, repeatability, and temperature error) |
| Response Time | ≤ 10ms |
| Insulation Resistance | ≥ 100MΩ at 100V DC |
| Operating Temperature | -30°C ~ +65°C |
| Compensated Temperature | -30°C ~ +65°C |
| Storage Temperature | -40°C ~ +85°C |
| Long-Term Stability | ±0.2% FS per year |
| Vibration Resistance | 10g @ 10Hz ~ 2000Hz |
| Mechanical Shock | 100g @ 11ms |
| Wetted Materials | 316L stainless steel (diaphragm and pressure port) |
| Pressure Connection | G1/4 male thread |
| Electrical Connection | Cable outlet or 4-pin connector |
| Weight | Approx. 100g |
Application
The miniature pressure transmitter is the ideal solution for applications requiring accurate, reliable pressure measurement in space-constrained environments. Its compact size, 5V ratiometric output, and wide temperature compensation range make it particularly suited for test equipment integration, industrial automation, automotive systems, and portable instrumentation where traditional pressure transmitters cannot fit.
Test & measurement equipment
Industrial automation & control
Automotive pressure monitoring
Hydraulic & pneumatic systems
Medical device pressure sensing
HVAC & refrigeration
Process control instrumentation
Portable pressure calibration devices
External dimension
🔌Electrical Connection
| Wire Color | Function |
|---|---|
| Red | Power Supply Positive (V+) |
| Blue | Output Positive (Signal) |
| Black | Common Ground (GND) |
| Yellow | Case Ground (Shield) |
FAQ
Q: What is a miniature pressure transmitter and how does it work?
A: A miniature pressure transmitter is a compact device that converts applied pressure into a standardized electrical signal. It uses a piezoresistive sensing element with a stainless steel isolation diaphragm. When pressure is applied, the diaphragm deflects, changing the resistance of the sensing element. An integrated compensation circuit converts this change into a ratiometric 0.5-4.5V voltage output proportional to the applied pressure.
Q: What does "ratiometric output" mean?
A: Ratiometric output means the output voltage scales proportionally with the supply voltage. With a 5V supply, the output ranges from 0.5V at zero pressure to 4.5V at full scale. This ensures that any variation in the supply voltage is reflected in the output, providing excellent noise immunity and compatibility with ADC inputs that use the same reference voltage.
Q: What media can this transmitter measure?
A: The transmitter is compatible with any liquid or gas that is compatible with 316L stainless steel. This includes most industrial fluids, oils, air, nitrogen, and many chemical process media. For aggressive media such as strong acids or high-temperature corrosive fluids, please consult our engineering team for material recommendations.
Q: What is the difference between absolute, gauge, and sealed gauge pressure types?
A: Absolute pressure is measured relative to a perfect vacuum. Gauge pressure is measured relative to atmospheric pressure. Sealed gauge pressure is measured relative to a fixed reference pressure sealed inside the device. This transmitter is available in all three types-please specify your requirement when ordering.
Q: What is the total error band and why does it matter?
A: The total error band (TEB) is the combined accuracy specification that includes all error sources-nonlinearity, hysteresis, repeatability, and temperature error-across the full compensated temperature range. For this transmitter, TEB is ±1% FS from -10°C to 50°C and ±1.5% FS at the temperature extremes. This comprehensive specification provides a true picture of real-world performance.
Q: What is the recommended load resistance for the voltage output?
A: The minimum recommended load resistance is 10kΩ. Using a load resistance below this value may affect output accuracy. For most ADC inputs and data acquisition systems with high impedance inputs, this is not a concern.
Q: Is this product suitable for hazardous area installations?
A: This standard version is designed for general industrial and test equipment applications. For hazardous area installations requiring explosion-proof or intrinsically safe certifications, please contact our sales team for customized solutions.
Q: How do I select the right pressure range for my application?
A: Select a pressure range where your maximum operating pressure is between 50% and 90% of the full-scale range for optimal accuracy. Our engineering team can assist with sizing and range selection based on your specific application requirements-contact us for a free consultation.
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