Industrial use gas monitoring equipment PAS Sense 1512

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Overview
The ENVEA PAS Sense 1512 is a photoacoustic infrared gas monitor for quantitative, multi‑component analysis of gases that absorb in the mid‑IR. With up to five interchangeable optical filters it measures up to five component gases plus water vapor. The unit is suitable for bench use or portable field deployments and supports remote control and data exchange via USB, Ethernet and RS232.

Measurement principle
Photoacoustic infrared detection: incident IR radiation is absorbed by target gas molecules and converted into an acoustic signal. Selectivity is provided by optical filters; installing specific filters configures channels for target gases and enables cross‑compensation when measuring known interferents.

Key features

• Measures up to five gases plus water vapor via optical filter channels
• Selective measurement of a wide range of IR‑absorbing gases and vapors (VOC, SF6, EtO, CO2, NH3, etc.)
• Linear response across a wide dynamic range for accurate quantification
• Low calibration frequency: typically requires a maximum of two calibrations per year
• Easy calibration, configuration and data review via PC software
• Compensates temperature, pressure and water‑vapor interference; supports cross‑compensation for known interferents
• Extremely low sample purge volume and negligible warm‑up time
• Remote control capability over TCP/IP and expandability with 1409 Multipoint Sampler (up to 24 locations)

Main applications

• SF6 leak and tightness testing of insulated switchgear
• Automotive evaporative (SHED) permeation testing for VOC emissions
• Ambient VOC monitoring from organic solvents
• Ventilation and air‑exchange performance studies
• Measurement of anesthetic gases in operating theatres for personnel safety
• Agricultural emissions monitoring (soil, manure, livestock)
• Greenhouse gas emissions monitoring
• Ethylene oxide monitoring in medical device sterilization facilities
• Formaldehyde detection for workplace safety
• Detection of harmful gases in battery manufacturing
• Air‑conditioner refrigerant emissions monitoring (R134a, HFO‑1234yf)
• Photocatalytic material testing and research
• Detection of airborne pollutants absorbing in the mid‑IR down to ppb levels

Technical information
Measured gases: EtO / SF6 & CO2 / NH3, ethanol, N2O, CO2, CO & H2O
Zero drift: typically ± detection limit per 3 months
Repeatability: 1% of measured value
Range drift: ±2.5% of measured value per 3 months
Temperature influence (zero): ±10% of detection limit/°C
Temperature influence (range): ±0.3% of measured value/°C
Pressure influence (zero): ±0.5% of detection limit/mbar
Pressure influence (range): -0.01% of measured value/mbar
Detection limit reference: 5 s S.I.T.
Internal data storage: 131072 measurement cycles (≈22 days at 15 s cycle)
Dimensions (HxWxD) & weight: 195 x 443 x 244 mm / 11 kg
Communication: USB, Ethernet, RS232; remote control via TCP/IP

Technical specifications

• Model: PAS Sense 1512
• Brand: ENVEA
• Measurement principle: photoacoustic infrared detection with optical filters
• Channels/filters: up to 5 filters (measures up to 5 gases + H2O)
• Typical calibration frequency: max two calibrations per year
• Detection limit: ppb range (gas and conditions dependent; reference 5 s S.I.T.)
• Repeatability: ~1% of measured value
• Internal memory: 131072 cycles (~22 days @15 s)
• Interfaces: USB, Ethernet, RS232; TCP/IP remote control
• Expandability: up to 24 sampling points with 1409 Multipoint Sampler