Description

Emerson PT5-50M Refrigeration Pressure Transmitter

Technical Specifications

• Product Model: PT5-50M
• Brand: Emerson (Copeland/Alco Controls)
• Warranty: One Year
• Input Voltage: 7–30 V DC DC loop power supply
• Operating Temperature: Ambient -40°C to +85°C
• Storage Temperature: -45°C to +90°C
• Response Time: ≤15ms pressure signal conversion response
• Protection Class: IP65 enclosure rating
• Accuracy Class: ±0.5% FS full scale measurement accuracy
• Output Frequency: Static linear analog 4–20mA DC output
• Rated Current Range: 4–20mA proportional output, maximum load current 25mA
• Communication Interface: M12 4-pin circular industrial plug interface
• Supported Protocols: Standard 4-20mA analog hardwired signal for PLC/DCS access
• Overload Capacity: 72bar maximum allowable working pressure, 400bar burst pressure
• Dimensions: 65mm total length × 32mm hexagonal thread body diameter
• 

Product Overview

The PT5-50M is a compact industrial pressure transmitter from Emerson PT5 series, engineered exclusively for pressure monitoring and closed-loop control in refrigeration, HVAC and heat pump systems. Calibrated for a 0–50bar measuring range, this sensor converts refrigerant line hydraulic pressure into standardized 4–20mA linear electrical signals, feeding real-time data to refrigeration controllers, PLCs and electronic expansion valve drive boards to implement superheat regulation, compressor load protection and system high/low pressure interlock protection.

Constructed with a stainless steel pressure sensing diaphragm and fully sealed metal housing, the unit features a 7/16”-20UNF process thread with built-in Schrader valve piercing pin for direct installation on refrigerant service ports without additional adapters. It eliminates measurement drift caused by refrigerant temperature fluctuation, oil contamination and minor pipeline vibration, stabilizing the automatic adjustment of EEV opening and preventing compressor shutdown triggered by false pressure alarms. Refrigeration system designers, HVAC maintenance technicians and cold storage equipment integrators benefit from its factory pre-calibrated fixed range design, wide refrigerant medium compatibility and robust EMC anti-interference performance, which cuts on-site calibration workload and extends service life in harsh mechanical room environments.