Produced by bonding SS316L metal powder under elevated temperature, this rigid filter disc contains a continuous three-dimensional lattice of open channels with micron-sized, evenly distributed passages. The all-metal sintered structure maintains geometric stability and filtration precision even under external pressure or during reverse backflushing, while delivering reliable corrosion resistance and thermal tolerance. Its flat disc shape and precisely controlled thickness allow exact placement within sensor cavities or the narrow flow paths of instruments and meters, serving as a direct‑contact filtration element.

In sensor and instrument protection applications, this disc is typically installed at pressure transmitter taps, gas sensor inlets, analyzer sampling lines, or instrument vent reference ports. Its primary function is to intercept solid contaminants entrained in gas or liquid streams－including dust, rust, fibers, and oil mists－preventing these particles from invading and clogging sensitive elements or damaging measurement diaphragms. The depth filtration capability provided by the sintered metal micro-porous structure, combined with its cleanable and reusable nature, makes it a non-reducible precision protection component for online monitoring equipment and industrial instrumentation that demands long‑term reliable operation.

Products Specifications

Material: SS316L powder

Diameter: 19.1mm

Thickness: 1.63mm

Technique: Sintering

Products Features

High Mechanical Compression Strength

The sintered all-metal structure enables the filter disc to withstand mounting preload torque and dynamic loads such as pressure surges or fluid impacts without plastic deformation or edge fragmentation, ensuring long‑term sealing reliability and consistent filtration performance in sensor assemblies.

Precision Pore Size Distribution

By precisely managing SS316L powder gradation and the thermal sintering curve, the disc forms a consistent and repeatable pore matrix that traps particulates exceeding a specified cut-point, directly minimizing measurement drift and nuisance alarms from external contamination entering the sensor.

Low Flow Resistance

Even with effective particle retention, the filter's low-profile shape and its open-cell sintered structure impose only negligible resistance to flow, permitting gases or liquids to cross the disc while leaving sensor transient response and measurement accuracy unaltered. This balance of robustness, precision, and permeability makes the SS316L sintered disc uniquely suited for mission-critical applications.

Corrosion Resistance & Cleanability

The SS316L substrate offers excellent resistance to pitting, crevice corrosion and stress corrosion cracking, making it compatible with humid, saline, acidic or alkaline process media as well as common chemical cleaning agents. Furthermore, the sintered body supports repeated regeneration via ultrasonic cleaning, high‑pressure backwashing or high‑temperature baking, significantly extending service life.

Compact Edge Fit

Precisely controlled outer diameter tolerance and end‑face flatness allow the filter disc to seat directly into the mounting groove or alignment step inside a sensor cavity, requiring no additional sealing ring or elastic support. This design is particularly suited for in‑situ protection in miniature instruments and compact flow paths.

High‑Temperature Operational Stability

The sintered SS316L filter disc maintains dimensional accuracy, pore structure and mechanical integrity across a wide operating range (–200°C to 600°C) without noticeable degradation. It is therefore well‑suited for protecting high‑temperature flue gas analyzers, hot gas sensors, steam line instruments, and analytical equipment requiring periodic high‑temperature sterilization at the inlet.

Products Applications

Pressure Transmitter Tap Port Protection

Installed between the media inlet and the sensing diaphragm of a pressure transmitter, the filter disc blocks weld slag, rust particles and process debris from piping, preventing diaphragm scoring or oil-filled cavity blockage and ensuring authentic pressure signal transmission.

Gas Detector Inlet Chamber Filtration

Placed at the gas inlet port of combustible or toxic gas detectors, the filter disc intercepts airborne dust, fibers and oil mists, avoiding surface contamination or catalytic bead poisoning, thereby reducing false alarms and zero drift.

Analyzer Sampling Stream Pre‑treatment

Serving as a pre‑filter element in the sampling line of online chromatographs, spectrometers or mass spectrometers, the disc removes suspended particulates from sample gas or liquid, protecting downstream valves, columns and detection cells from physical damage.

Instrument Vent Reference Port Dust Sealing

Mounted on the atmospheric reference port of pressure or differential pressure transmitters, the filter disc prevents environmental dust, insect debris and moisture ingress into the electronic housing, keeping the reference cavity clean and suitable for outdoor or dusty work sites.

Hydraulic System Sensor Inlet Protection

Assembled at the pressure‑taking port of pressure switches or temperature sensors in hydraulic stations, the filter disc resists metal wear particles and colloidal impurities in hydraulic oil, preventing sticking or abrasion of sensitive elements and extending sensor service life online.

Medical Analyzer Front‑End Filtration

Used at the sample aspiration port of blood gas analyzers or biochemical analyzers, the filter disc filters out micro clots and fibrin from sample fluids, ensuring unobstructed detection channels and avoiding costly clogging and scrapping of sensor chips.