GASSENSE 200 Portable & Fixed-Mount VOC Detector

Overview

The GASSENSE 200 is a dual-mode volatile organic compound (VOC) detection system engineered for flexibility across field survey, occupational hygiene assessment, and semi-permanent ambient air monitoring applications. Utilizing a calibrated metal oxide semiconductor (MOS) sensing element optimized for aromatic hydrocarbons—including toluene as the primary reference gas—the instrument delivers rapid, field-deployable quantification of total VOC concentrations in real time. Its measurement principle relies on reversible surface adsorption-induced resistance changes in the heated sensing layer, providing robust response to a broad spectrum of organic vapors including aliphatic, aromatic, and oxygenated compounds. Designed for compliance with routine industrial hygiene protocols and preliminary site characterization workflows, the GASSENSE 200 operates without consumables or catalytic converters, minimizing maintenance overhead while maintaining trace-level sensitivity in dynamic environmental conditions.

Key Features

• Modular architecture: Detachable sensor probe connects to main unit via shielded cable up to 14 meters—enabling remote sampling in confined spaces, ducts, or hazardous zones while keeping the operator at safe distance.
• Dual deployment modes: Functions as both handheld survey instrument and fixed-mount monitor when equipped with optional FRP (fiberglass-reinforced polymer) enclosure kit for outdoor or industrial wall mounting.
• Intuitive human interface: Backlit LCD display shows real-time concentration (ppm), battery status, sensor health indicator, and operational mode—supporting immediate visual verification without external software.
• Energy-efficient operation: Configurable standby mode extends battery life; two rechargeable battery options provide field endurance up to 12 hours (Ni-MH) or 6 hours (Ni-Cd) under continuous use.
• Environmental resilience: Rated for operation across −20 °C to +60 °C and 5–95% RH (non-condensing), enabling reliable performance in unconditioned indoor facilities, warehouses, and outdoor perimeter monitoring locations.
• Electromagnetic compatibility: Certified to EN 50082-1 (immunity) and EN 50081-1 (emissions), ensuring stable operation near variable-frequency drives, RF transmitters, and other industrial EMI sources.

Sample Compatibility & Compliance

The GASSENSE 200 is calibrated using toluene vapor as the primary reference standard, delivering quantitative results traceable to NIST-traceable calibration gases. While optimized for aromatic VOCs, it exhibits cross-sensitivity to common solvents such as acetone, ethanol, xylene, and ethyl acetate—making it suitable for leak detection, solvent storage area monitoring, and post-remediation verification per ASTM D5197 and ISO 16000-6 guidance. The MOS sensor does not require zero-air supply or active humidity compensation, though users should note that high relative humidity (>80% RH) may slightly attenuate response magnitude for low-concentration events. All units are supplied with factory calibration certificate and comply with FCC Part 15 Class B limits for unintentional radiators—meeting baseline electromagnetic safety requirements for laboratory and light industrial environments.

Software & Data Management

The GASSENSE 200 operates as a standalone instrument with no embedded data logging or PC connectivity. However, analog output (0–5 V DC proportional to ppm reading) and digital alarm relay contacts (SPST, 30 VDC/1 A) are provided for integration into SCADA systems, PLC-based control panels, or third-party dataloggers compliant with Modbus RTU or 4–20 mA input standards. For regulatory reporting, users may manually record timestamped readings during walkthrough surveys or pair the unit with external USB dataloggers certified to IEC 61000-4-30 Class A. While the device itself does not support FDA 21 CFR Part 11 electronic signature or audit trail functionality, its passive analog interface allows seamless incorporation into validated GxP-compliant monitoring networks when paired with compliant backend infrastructure.

Applications

• Industrial hygiene screening in paint booths, printing facilities, and adhesive application zones per OSHA Method 1501 and NIOSH 1501.
• Indoor air quality (IAQ) assessments in office buildings, schools, and healthcare facilities following ASHRAE Standard 62.1 and ISO 16000-22.
• Leak detection and source identification during environmental site assessments (ESA) and Phase I/II investigations.
• Pre- and post-abatement verification in asbestos/VOC remediation projects aligned with EPA Method TO-17 and ASTM D6196.
• Temporary perimeter monitoring during tank cleaning, railcar off-gassing, or landfill cover installation activities.

FAQ

Can the GASSENSE 200 be calibrated for gases other than toluene?

Yes—custom calibration for alternative target analytes (e.g., benzene, formaldehyde, or isopropanol) is available upon request. Calibration must be performed by an authorized service center using certified gas standards traceable to national metrology institutes.

Is the sensor replaceable in the field?

The MOS sensor module is user-replaceable without tools. Replacement probes ship pre-calibrated and include updated firmware mapping to ensure continuity of measurement accuracy.

Does the instrument meet ATEX or IECEx certification requirements?

No—the GASSENSE 200 is not intrinsically safe and is not rated for Zone 0/1 hazardous areas. It is intended for general-purpose use in non-classified environments only.

What is the recommended recalibration interval?

Annual recalibration is advised under normal operating conditions. In high-exposure or corrosive environments (e.g., near chlorinated solvents or acidic fumes), biannual verification is recommended.

Can multiple GASSENSE 200 units be networked for centralized monitoring?

Not natively—but analog outputs and relay contacts enable integration into existing facility-wide monitoring systems via compatible PLCs, RTUs, or industrial IoT gateways supporting Modbus TCP or MQTT protocols.