PT-401 Refrigerant Pressure Transmitter / Transducer

PT-401 Refrigerant Pressure Transmitter features a high-precision ceramic core, anti-condensation design, and 4-20mA/0-5V output. Ideal for HVAC, chillers, and refrigeration systems.
Product Overview：

The PT-401 Pressure Transmitter is an industrial-grade pressure transducer specifically engineered for the refrigeration and HVAC industry. Featuring a high-precision ceramic piezoresistive sensor core paired with an advanced digital signal conditioning ASIC, the PT-401 converts refrigerant pressure into standard 4–20mA or 0–5VDC analog output signals. Designed with an innovative anti-condensation housing, it prevents moisture accumulation and protects internal circuitry in low-temperature environments, ensuring long-term reliability in chillers, air conditioners, and commercial refrigeration systems.

Key Features & Advantages:

1，Industry-Specific Anti-Condensation Design：
Engineered with a unique moisture-barrier structure that eliminates internal vapor condensation, preventing circuit board damage in extreme cold and freezing environments.

2，High-Precision Ceramic Piezoresistive Core：
Utilizes a robust ceramic pressure sensor combined with an advanced signal-conditioning chip, delivering high sensitivity, superior accuracy, and excellent long-term stability.

3，Digital Temperature Compensation & Linearity Correction
Features full-temperature range digital compensation to neutralize temperature drift, maintaining precise output under varying environmental conditions.

4，Compact Structure & Easy Installation
Lightweight and space-saving design with standard Packard (Hirschmann option) electrical connectors for plug-and-play installation in tight HVAC/R equipment spaces.

5，Flexible Signal Outputs & High Compatibility
Supports multiple output options (4–20mA, 0–5VDC), making it seamless to integrate into mainstream PLC, controllers, and building management systems (BMS).

6，Industrial Electrical Protection
Built with robust EMC protection, reverse polarity protection, and overvoltage resistance to ensure smooth operation under complex electrical conditions.

Applications：

1，HVAC & Commercial Air Conditioning Systems

2，Water-Cooled & Air-Cooled Screw Chillers

3，Industrial Refrigeration & Freezers

4，Heat Pump Equipment

5，Refrigerant Pressure Monitoring & Control