Baseline piD-TECH® eVx™ 045-011 Intrinsically Safe Photoionization Detector (PID) Sensor – Purple Variant

Overview

The Baseline piD-TECH® eVx™ 045-011 is an intrinsically safe, fourth-generation photoionization detector (PID) sensor engineered for high-fidelity detection of volatile organic compounds (VOCs) in ambient air and industrial process environments. Operating on the principle of ultraviolet (UV) photon-induced ionization—typically at 10.6 eV photon energy—the sensor ionizes VOC molecules with ionization potentials below this threshold, generating a proportional current signal measured across a pair of electrodes. This physics-based detection mechanism enables broad-spectrum, non-destructive, real-time quantification of aliphatic hydrocarbons, aromatics, ketones, esters, and other low-molecular-weight organics without chemical consumption or reagent dependency. Designed specifically for integration into OEM portable, transportable, and fixed-mount gas monitoring systems, the eVx™ 045-011 conforms to the mechanical and electrical footprint of Baseline’s established 4-Series electrochemical sensor platform—facilitating drop-in replacement and minimizing redesign overhead for system integrators.

Key Features

• Intrinsically safe architecture certified to UL 913, CAN/CSA C22.2 No. 152, ATEX II 1G Ex ia IIC T4 Ga, and IECEx Ex ia IIC T4 Ga standards—enabling deployment in Class I, Division 1 hazardous locations.
• Dual-stage particulate filtration system mitigates fouling from dust, aerosols, and condensate—extending operational uptime and reducing calibration drift in field-deployed instruments.
• Integrated lamp restart circuit ensures consistent, repeatable UV lamp ignition under variable power conditions—critical for battery-operated handheld devices and intermittent-duty applications.
• Long-life 10.6 eV UV lamp with stable output profile over >12,000 hours of cumulative operation—verified per IEC 60079-29-1 Annex B accelerated lifetime testing protocols.
• On-board linear voltage regulation delivers tightly controlled bias to the ionization chamber—minimizing signal noise and enhancing baseline stability across temperature gradients from −20 °C to +50 °C.
• Electrode-level humidity compensation algorithm suppresses cross-sensitivity to relative humidity fluctuations up to 95% RH non-condensing—eliminating need for external desiccant cartridges or active drying modules.
• Optimized electrode geometry and chamber geometry yield T90 response time < 2 seconds for common VOCs (e.g., isobutylene, benzene, acetone), supporting dynamic leak detection and fast-cycle process monitoring.

Sample Compatibility & Compliance

The eVx™ 045-011 is validated for continuous measurement of total VOC (TVOC) in ambient air, workplace breathing zones, indoor air quality (IAQ) networks, and fugitive emission surveys. It exhibits minimal interference from CO₂, CH₄, H₂O vapor, and common inorganic gases (e.g., NOₓ, SO₂, O₃) due to its selective ionization energy window. The sensor complies with ISO 16000-29 for VOC sensor performance evaluation and supports traceable calibration against certified isobutylene standards per ASTM D5403. Its intrinsic safety certifications align with global regulatory frameworks governing instrument deployment in petrochemical, pharmaceutical, semiconductor, and wastewater treatment facilities—including adherence to IEC 61511 for functional safety in SIS-relevant applications.

Software & Data Management

While the eVx™ 045-011 operates as an analog (4–20 mA or 0–5 V) or digital (RS-485 Modbus RTU) output sensor, it is fully compatible with Baseline’s proprietary Sensor Integration Toolkit (SIT v3.2+), enabling OEMs to implement automated zero/span verification, diagnostic logging, and firmware-upgradable lamp health monitoring. When integrated into systems compliant with FDA 21 CFR Part 11, the sensor’s analog output path supports audit-trail-capable data acquisition when paired with validated DAQ hardware—meeting GLP/GMP requirements for environmental monitoring in regulated manufacturing environments.

Applications

• Portable VOC survey meters for HAZMAT response and industrial hygiene compliance (OSHA PEL, ACGIH TLV).
• Fixed-point perimeter monitoring in refineries, tank farms, and chemical storage areas per EPA Method 21 and LDAR programs.
• Indoor air quality (IAQ) controllers in smart building HVAC systems—triggering demand-controlled ventilation upon TVOC threshold exceedance.
• OEM integration into drone-mounted gas mapping platforms for aerial leak detection and plume dispersion modeling.
• Continuous emissions monitoring (CEM) pre-screening modules upstream of GC-FID or FTIR analyzers for VOC speciation workflows.

FAQ

What VOCs does the eVx™ 045-011 detect?
It detects VOCs with ionization potentials ≤10.6 eV—including benzene, toluene, xylene, styrene, formaldehyde (with optional catalytic pre-concentrator), acetone, ethanol, and most chlorinated solvents.
Is field calibration supported?
Yes—zero and span calibration can be performed using certified isobutylene gas standards; the sensor includes dedicated calibration mode accessible via Modbus register or analog pulse sequence.
Can the sensor operate in high-humidity environments?
Yes—its electrode-level humidity suppression design maintains accuracy up to 95% RH without external drying, verified per IEC 60068-2-30 damp heat testing.
What is the expected service life under continuous operation?
With proper maintenance and exposure within specified limits, the UV lamp achieves ≥12,000 operating hours; electrodes and filters are replaceable in-field without soldering or specialized tools.
Does Baseline provide technical integration support for OEM customers?
Yes—Baseline’s Applications Engineering team offers schematic review, PCB layout consultation, EMC pre-compliance guidance, and firmware co-development services under NDA.