Product Details

The Fireye PXMS-300K is a high-precision piezoresistive pressure transmitter belonging to the PXMS-K sensor series, widely used for steam and process pressure monitoring on Fireye Nexus combustion control platforms. This piezoresistive pressure transmitter converts media pressure into standard linear 4‑20mA analog signal and feeds real-time pressure readings back to PPC4000, PPC5000, NX6100 and NX6300 fuel-air ratio controllers for closed-loop combustion regulation. As a reliable 4-20mA steam sensor, it adopts laser-welded stainless steel isolation diaphragm and internal silicone oil filling to protect the sensing chip from harsh boiler media, delivering stable measurement under continuous thermal fluctuation. This Fireye Nexus pressure probe is critical for boiler pressure safety interlock and efficiency trimming and stocked as genuine replacement spare part for modern Fireye burner management systems.

Basic Parameters

Brand: Fireye

Model: PXMS-300K

Type: Pressure transmitter / steam pressure sensor

Measuring range: 0–300 PSI (0–21 bar)

Output signal: 4–20 mA linear output

Process connection: 1/2 inch NPT thread

Sensing technology: Piezoresistive silicon sensing element

Diaphragm: Stainless steel, laser welded

Compatible controllers: PPC4000, PPC5000, NX6100, NX6300 Nexus combustion controllers

Self-check status: Non self-check

Variant note: PXMS‑15K, PXMS‑60K, PXMS‑200K, PXMS‑400K available for other pressure ranges

Product type: Original Fireye combustion pressure sensor

Supported Functions

This transmitter continuously measures steam or process fluid pressure and transmits proportional analog signal to the host combustion controller. The control system uses this pressure data to adjust firing rate, trigger high/low pressure safety interlocks and optimize fuel-air ratio for higher combustion efficiency. It supports continuous trending for boiler monitoring and provides pressure feedback for automatic burner load regulation.

Core Functions

The fully sealed stainless steel pressure cell resists moisture, condensate and minor corrosion inside steam systems. The standard 4‑20mA signal ensures easy integration with Fireye Nexus control loops without extra signal conversion. Compact threaded design enables direct installation on boiler pressure tapping points, and it serves as direct drop‑in substitution for existing PXMS‑300K pressure transmitters.

Hardware Specifications & Environmental Features

Mounting: 1/2" NPT threaded process connection

Operating media: Steam, water and compatible 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 Nexus controller compatibility before ordering; this unit is non self-check and requires regular calibration for accurate pressure measurement.

This is from our current stock.

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