Measurement Principle & Electrical PerformanceMatches Panametrics alumina probes to convert medium water vapor concentration into impedance signals, the internal main processor calculates dew point, frost point, ppmv, lb/MMSCF and other multi-unit humidity values with built-in temperature compensation algorithm. The measurement range covers +20°C ~ -110°C dew point; the precision reaches ±2°C within -65℃~10℃ dew point interval, with excellent repeatabilityManualsLib. Equipped with large backlit graphic LCD screen, supporting numerical and curve two display modes; the built-in flash memory can store up to 60 groups of site log data, equipped with IrDA infrared communication interface for data export to computer for report analysis. The rechargeable lithium battery supports continuous working for 12–16 hours; the whole machine has intrinsic safety certification, and the battery can be disassembled and replaced in hazardous areas (charging must be completed in non-hazardous zones)ManualsLib. All calibration parameters are solidified in non-volatile storage without data loss after power failure, and core electronic components pass high-low temperature aging screening.

Structural Design & Environmental AdaptabilityThe host body is compact handheld structure with overall size 238×138×38 mm and net weight only 1.13kg, reaching IP67 protection grade with good dustproof and waterproof performance. The internal circuit board is coated with anti-moisture and anti-corrosion conformal coating, adapting to complex environments such as petrochemical sites, natural gas stations, power hydrogen rooms and heat treatment workshops. The supporting complete sampling system is equipped with pressure gauge, pressure stabilizing valve and stainless steel sampling tube, which can adapt to medium pressure within 0~5000psig. The whole set is equipped with portable backpack with hand-held handle and shoulder strap for mobile field carrying and measurement operation, with strong anti-vibration performance adapting to field pipeline vibration conditions.

Matched Components & Application ScenariosCompatible with full range of M21R, MS29, MS32, Ni2 alumina probes, matched with PRE-6-40 pressure reducing valve and sampling filter accessories; supports MG101 calibrator for regular traceable calibration verification. Widely used in natural gas pipeline dew point inspection, power generator hydrogen system spot check, air separation high-purity gas detection, SF6 switch gas monitoring, semiconductor ultra-pure gas detection, heat treatment furnace atmosphere monitoring and factory daily pipeline moisture patrol inspection. Used as a complete replacement host when the original portable instrument has screen failure, data logging abnormality and measurement drift faults.

Stability & Maintenance AdvantagesNo internal mechanical wearing parts, long service life and low daily maintenance cost. The instrument and supporting sampling components are integrally calibrated before delivery to ensure consistent measurement accuracy among batches. The humanized button operation simplifies field parameter setting and data recording work, greatly shortening on-site measurement time cost. Original genuine PM880 effectively avoids measurement deviation caused by inferior substitutes and protects expensive alumina probes from abnormal signal impact. Shockproof sealed packaging meets long-term spare parts inventory storage requirements, and the overall measurement performance keeps stable under dry constant-temperature storage conditions.