Product Details

The Fireye PXMS-300 is a precision piezoresistive pressure transmitter from the classic PXMS series, designed for Fireye legacy combustion control systems. This piezoresistive pressure transmitter converts steam or process pressure into standard 4‑20 mA linear analog signal and feeds real-time pressure data back to NX3100, NX4100 and PPC5000 controllers for closed-loop fuel-air ratio regulation and boiler load management. As a reliable 4-20mA boiler pressure probe, it adopts 316L stainless steel wetted parts and laser-welded isolation diaphragm, resisting condensate and mild corrosion in boiler environments. This Fireye PXMS series sensor is widely used for steam pressure monitoring, high / low pressure interlock and combustion efficiency trimming and stocked as genuine replacement spare part for Fireye burner management systems.

Basic Parameters

Brand: Fireye

Model: PXMS-300

Type: Pressure transmitter / steam pressure sensor

Measuring range: 0–300 PSI (0–21 bar)

Output signal: 4–20 mA

Process connection: 1/2 inch NPT thread

Sensing element: Piezoresistive silicon sensor

Wetted material: 316L stainless steel

Compatible controllers: NX3100, NX4100, PPC5000

Self-check status: Non self-check

Variant note: PXMS-300 is the older version; PXMS-300K is the updated K variant for newer Nexus platforms

Accuracy: ±0.25% full scale

Product type: Original Fireye combustion pressure sensor

Supported Functions

This transmitter continuously samples media pressure and transmits proportional analog feedback to the host combustion controller. The system uses this pressure reading to adjust burner firing rate, trigger safety interlocks and optimize fuel-air mixture for stable and efficient combustion. It supports long-term pressure trending for boiler operation logging and routine performance audit.

Core Functions

The fully sealed pressure cell delivers stable measurement under repeated thermal cycling. Standard 4‑20 mA signal simplifies wiring and integration with Fireye legacy control loops. Compact threaded body allows direct tapping installation on boiler pressure points, and it serves as direct drop‑in substitution for existing PXMS-300 pressure transmitters.

Hardware Specifications & Environmental Features

Mounting: 1/2" NPT threaded process connection

Compatible media: Steam, water and non-corrosive process fluid

Operating temperature: -20 °C to +85 °C

Storage temperature: -40 °C to +85 °C

Relative humidity: 5% – 95%, non‑condensing

Housing: Rugged stainless steel sensor assembly

Condition: Original new Fireye pressure transmitter

Industry Applications: Applied in legacy petrochemical distributed control, old paper making production automation, material handling conveyor lines, packaging and textile machinery, water treatment remote signal collection and large conveyor remote I/O control racks.

Note: Confirm pressure range, thread size and legacy controller compatibility before ordering; PXMS-300 differs from PXMS-300K and cannot be interchanged blindly.

This is from our current stock.

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