High Temperature Pressure Transmitters (up to 200°C) | P20T & PM424
Heavy-duty high-temperature pressure transmitters engineered for reliable media pressure measurement in demanding environments up to 200°C. Designed with integrated cooling fins and advanced sensor diaphragms, these sensors prevent heat damage to internal electronics while maintaining high accuracy in steam, oil, gas, and chemical lines.
Choose Between Two Performance Levels:
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P20T Series: Standard industrial solution with standard accuracy (≤1.0% F.S.), rugged IP65 housing, and standard analog output options (4–20 mA / 0–10 V).
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PM424 Series: High-precision upgrade (up to 0.1% / 0.25% accuracy) featuring a titanium alloy diaphragm, explosion-proof ratings, and RS485 Modbus or HART digital communication.
Description
High-Temperature Pressure Transmitters (Up to 200°C)
Measuring pressure in high-temperature media poses a significant challenge for standard industrial transmitters. Direct contact with steam, hot oil, or high-temperature gases can cause severe thermal drift or total electronic failure.
Our high-temperature pressure transmitter series resolves this issue using a specialized cooling fin radiation structure that dissipates heat before it reaches the internal sensing element and circuitry. Whether you need a cost-effective standard transmitter for process monitoring or a high-accuracy, digitally networked transmitter for critical control, this line offers a tailored configuration for your application.
Key Highlights
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Wide Media Temperature Range: Safe continuous operation up to 200°C.
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Flexible Sensor Technologies: Available with high-stability silicon/sapphire dies or heavy-duty titanium alloy diaphragms for harsh/corrosive media.
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Versatile Signal Output: Choose traditional 4–20 mA 2-wire / 0–10 V 3-wire outputs or advanced digital integration via RS485 Modbus RTU and HART protocols.
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Industrial Durability: Robust stainless steel or titanium construction rated from IP65 up to IP68 submerged/flameproof options.
Typical Applications
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Boiler room and steam pressure monitoring
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Hydraulic fluid and hot oil circulation systems
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High-temperature liquid and gas pipeline testing
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Chemical process lines and aggressive fluids (Titanium PM424 option)
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Thermal energy management and HVAC systems
Features
Core Features & Advantages
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Thermal Isolation Technology: Built-in radiating fins create an effective thermal buffer between the process port and electronic transmitter head.
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Corrosion-Resistant Diaphragm Options: Standard silicon/sapphire for clean fluids and gases, or high-grade Titanium alloy for harsh industrial chemicals and marine environments.
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Dual Performance Tiers: Select exact specifications to match budget and technical needs—from robust standard setups to high-precision calibration (up to 0.1% F.S.).
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Multi-Protocol Connectivity: Full compatibility with traditional PLCs, analog controllers, and modern SCADA/IoT networks (RS485 Modbus, HART).
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Overpressure & Transient Protection: Engineered with high burst pressure margins and transient voltage suppression to safeguard against pressure spikes.
Specification
| Technical Parameter | P20T Series (Standard) | PM424 Series (High-Precision / Premium) |
| Max Media Temperature |
Up to 200°C |
Up to 200°C |
| Accuracy Class |
≤ ±1.0% F.S. |
0.5% F.S. (Standard) / Up to 0.25% or 0.1% F.S. |
| Sensing Diaphragm |
Silicon / Sapphire die with radiating fins |
Titanium Alloy with radiating fins |
| Ingress Protection |
IP65 |
IP65 / IP67 / IP68 (Submersible) options |
| Output Signal Options |
4–20 mA (2-wire), 0–5V, 0–10V (3-wire) |
4–20 mA, 0–10V, RS485 Modbus, HART |
| Hazardous Area Rating |
Standard Industrial |
Flameproof / Explosion-Proof Options |
| Housing Material |
Stainless Steel |
Stainless Steel / Titanium Alloy Body |
| Process Connections | G1/4″, G1/2″, NPT threads (Custom available) | G1/4″, G1/2″, NPT threads (Custom available) |
FAQ
Q1: How do these pressure sensors handle temperatures up to 200°C?
A: These transmitters utilize integrated cooling fins located between the thread process connection and the transmitter head. Heat dissipates across the cooling structure before reaching the delicate sensing chip and internal amplifier electronics, allowing stable measurement in high-temperature media.
Q2: Which model should I choose: P20T or PM424?
A:
Choose P20T if you need a standard, reliable industrial sensor (±1.0% accuracy) with analog output (4–20 mA or 0–10 V) for non-aggressive steam, gas, or water pressure testing.
Choose PM424 if your application requires higher precision (up to 0.1%), digital communication (RS485 Modbus or HART), a titanium diaphragm for corrosive media, or explosion-proof certifications.
Q3: Can these sensors be used with corrosive liquids or gases?
A: For corrosive fluids or aggressive chemical media, we recommend the PM424 Series fitted with a Titanium alloy diaphragm and body, which provides exceptional chemical compatibility and corrosion resistance compared to standard stainless steel or silicon components.
Q4: What electrical connection and output options are available?
A: Standard options include 2-wire 4–20 mA current loops and 3-wire voltage outputs (0–5V, 0–10V). Advanced digital options include RS485 Modbus RTU and HART protocol for seamless Integration into modern automation and monitoring systems.
Q5: What process thread sizes are offered?
A: Standard process connections include standard industrial sizes such as G1/4″, G1/2″, 1/4″ NPT, and 1/2″ NPT. Custom thread types can be supplied upon request.
