GE MMS3-221-40-0400 belongs to GE Panametrics MMS standard alumina probe family, specially developed for supporting MMS-3 host analyzer system. Each field of the model code corresponds to structural configuration: 221 stands for probe insertion length, standard NPT thread interface and single-layer high-density sintered stainless steel filter; 40 defines the maximum withstand pressure rating of the probe body; 04 is the built-in precision NTC thermistor specification for medium temperature collection; the last two 00 represent factory original standard calibration data curve without customized correction parametersManualsLib. The probe converts water vapor partial pressure inside gas into linear capacitance signals via thin-film alumina sensing chip, and the host calculates dew point, frost point and ppm moisture content values synchronously.

The measurable dew point range covers -110℃ ~ +60℃, with measurement precision controlled within ±2℃ in the conventional working interval, meeting the ultra-dry detection demands of compressed air, nitrogen, hydrogen, natural gas and SF6 insulating gas. The built-in thermistor transmits real-time medium temperature data to the analyzer, and the system algorithm automatically eliminates measurement errors caused by pipeline temperature drift to guarantee stable data output under 24-hour continuous online operation. All media contact components adopt integrated seamless 316 stainless steel processing, with the maximum allowable working pressure reaching the parameter level defined by code 40, adapting to high-pressure pipeline working conditions in air separation, petrochemical and power industries.

The front-end sintered metal filter effectively intercepts pipeline dust, oil mist and liquid droplets, avoiding contamination and failure of the fragile alumina sensing chip and extending the service cycle of the core sensing element. The overall probe body adopts full epoxy sealed potting treatment, with good moisture-proof, splash-proof and weak chemical corrosion resistance, suitable for installation environments such as compressor rooms, outdoor sampling pipelines and chemical instrument cabinets. The internal signal wire is wrapped with dense copper braided shielding to suppress electromagnetic interference from on-site pumps, inverters and power distribution equipment, ensuring high-fidelity transmission of weak moisture signals over long distancesManualsLib.

The tail aviation sealed connector supports plug-and-play wiring connection with dedicated signal cables, which can be quickly disassembled and replaced without modifying the original system wiring layout during maintenance work. The product has obtained intrinsic safety certification conforming to ATEX EEx ia IIC T4 standard, and can be safely deployed in Zone 0, Zone 1 hazardous areas when used with certified safety barriers. Every finished probe is calibrated by NIST-traceable standard moisture gas before delivery, with official calibration report attached for factory filing and third-party metering audit.

No mechanical moving wearing parts are arranged inside the probe assembly. Daily maintenance only needs regular inspection of filter blockage status and annual calibration verification according to gas medium cleanliness. When the sensing performance decays, only the internal alumina chip needs to be replaced instead of the whole probe, effectively reducing the enterprise spare parts cost and maintenance downtime. It is widely used in power SF6 gas monitoring, heat treatment protective gas detection, pharmaceutical clean gas monitoring, natural gas pipeline dehydration effect evaluation and other industrial gas quality control scenariosManualsLib