Product Details

The Fireye PXMS-15 is a precision piezoresistive pressure transmitter from the original classic PXMS series, designed for Fireye legacy Nexus combustion control platforms. This piezoresistive pressure transmitter converts low steam and process pressure into standard linear 4‑20mA analog signals and transmits real-time pressure feedback to NX3100, NX4100 and early PPC5000 fuel-air ratio controllers for closed-loop combustion regulation. As a reliable 4-20mA legacy low pressure probe, it adopts laser-welded 316L stainless steel isolation diaphragm and internal silicone oil filling, protecting the sensing chip from condensate and mild corrosion while maintaining stable readings under repeated thermal cycling. This Fireye PXMS series transducer is widely used for low steam pressure monitoring, differential pressure supervision and low-limit safety interlock on old light-load boilers, and stocked as genuine replacement spare part for legacy Fireye burner management systems.

Basic Parameters

Brand: Fireye

Model: PXMS-15

Type: Pressure transmitter / steam pressure sensor

Measuring range: 0–15 PSI (0–1 bar)

Output signal: 4–20 mA linear output

Process connection: 1/2 inch NPT thread

Sensing technology: Piezoresistive silicon sensing element

Wetted material: 316L stainless steel

Compatible controllers: NX3100, NX4100, early PPC5000

Self-check status: Non self-check

Accuracy: ±0.25% full scale

Variant note: PXMS-15 is the older legacy version; PXMS-15K is the updated K variant for newer Nexus controllers

Product type: Original Fireye combustion pressure sensor

Supported Functions

This transmitter continuously samples low pressure of steam or compatible non-corrosive media and sends proportional analog signals to the host combustion controller. The system uses this pressure data to adjust burner firing rate, trigger low-pressure safety interlocks and fine-tune fuel-air ratio for stable and efficient combustion. It supports long-term pressure trending for boiler operation logging and routine performance auditing.

Core Functions

The fully sealed stainless steel pressure cell provides excellent temperature stability and resists vibration and moisture in boiler room environments. The standard 4‑20mA signal simplifies wiring and integration with legacy Nexus control loops without extra signal conversion. Its compact threaded body allows direct installation on low-pressure tapping points, and it serves as direct drop‑in substitution for existing PXMS‑15 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-15 differs from PXMS-15K and cannot be interchanged blindly, and this unit requires periodic calibration.

This is from our current stock.

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