Thermox CG1000 Portable Oxygen Analyzer
| Brand | PROCESS INSTRUMENTS |
|---|---|
| Origin | USA |
| Model | CG1000 |
| Type | Portable Oxygen Analyzer |
| Application | Industrial Process Control & Online Monitoring |
Overview
The Thermox CG1000 Portable Oxygen Analyzer is a rugged, field-deployable electrochemical gas analyzer engineered for accurate, real-time measurement of oxygen concentration in industrial process streams, combustion exhausts, inerting systems, and safety-critical confined-space environments. Utilizing a high-stability, temperature-compensated galvanic fuel cell sensor, the CG1000 delivers reliable O₂ quantification across a standard range of 0–25% vol (extendable to 0–100% vol upon configuration), with inherent linearity and minimal zero drift over extended operation. Its compact, intrinsically safe housing (certified to Class I, Division 1, Groups A–D per UL 913) enables deployment in hazardous locations without external barriers, while the integrated sample draw pump and adjustable flow control ensure representative gas sampling under variable pressure and humidity conditions. Designed for continuous duty or spot-check verification, the analyzer meets the operational demands of QA/QC technicians, plant engineers, and EHS professionals requiring traceable, repeatable oxygen data aligned with process safety management (PSM) protocols.
Key Features
- Galvanic electrochemical O₂ sensor with 24-month typical service life and factory calibration traceable to NIST standards
- Internal rechargeable Li-ion battery supporting >12 hours of continuous operation; USB-C charging and data export interface
- Backlit, high-contrast OLED display with real-time O₂ % reading, battery status, sensor health indicator, and alarm status
- Dual-stage particulate and hydrophobic membrane filtration to protect sensor from dust, oil mist, and condensate ingress
- Programmable high/low concentration alarms with visual (flashing LED) and audible (85 dB) alerts; relay output option for integration into DCS or PLC systems
- IP65-rated enclosure with ergonomic rubberized grip and drop-tested construction (1.2 m onto concrete per MIL-STD-810G)
Sample Compatibility & Compliance
The CG1000 is validated for use with non-corrosive, non-condensing gas matrices including air, nitrogen, argon, helium, CO₂-rich flue gases (up to 15% CO₂), and hydrocarbon-free synthetic atmospheres. It is not suitable for direct measurement in strongly oxidizing environments (>100 ppm Cl₂, NOₓ, or SO₂), acidic vapors, or saturated steam. All sensor modules comply with ISO 17025-accredited calibration practices, and device firmware supports audit-ready calibration logging with user ID, date/time stamp, and span-gas lot number entry. The analyzer conforms to IEC 61508 SIL 2 functional safety requirements for safety-related applications and satisfies OSHA 1910.146 (Confined Space Entry) and NFPA 51B (Welding & Hot Work) oxygen monitoring mandates. Optional documentation packages include 21 CFR Part 11-compliant electronic records for regulated manufacturing sites operating under GMP/GLP frameworks.
Software & Data Management
The CG1000 interfaces via USB-C with Thermox ConfigStudio™ desktop software (Windows/macOS), enabling full instrument configuration, calibration history review, alarm threshold adjustment, and firmware updates. Raw time-series data (O₂ %, temperature, pressure, sensor voltage) are exportable in CSV format with millisecond timestamp resolution. For enterprise-level integration, optional Modbus RTU (RS-485) or 4–20 mA analog output modules support seamless connection to SCADA, MES, or CMMS platforms. All stored data retain immutable metadata—including operator credentials, environmental compensation parameters, and sensor diagnostic flags—ensuring full traceability during internal audits or regulatory inspections.
Applications
- Verification of inert gas purging efficacy prior to vessel entry or hot work in petrochemical and pharmaceutical facilities
- Monitoring O₂ depletion in modified atmosphere packaging (MAP) lines and food storage silos
- Combustion efficiency tuning in boiler and furnace stacks via flue gas O₂ analysis
- Leak detection in nitrogen blanketing systems for reactor vessels and storage tanks
- Field validation of fixed online analyzers during preventive maintenance or commissioning
- Emergency response screening for oxygen deficiency/enrichment hazards in mining, tunneling, and wastewater infrastructure
FAQ
What is the recommended calibration frequency for the CG1000 in routine industrial use?
For critical safety applications, daily bump testing with certified 20.9% O₂ air is required; full two-point calibration (zero and span) is recommended every 30 days or after exposure to extreme environmental shifts.
Can the CG1000 measure oxygen in high-humidity or wet gas streams?
It supports inlet dew points up to +10°C when equipped with the optional heated sample line accessory; unheated operation is limited to dry or moderately humid samples (<70% RH at 25°C).
Is sensor replacement user-serviceable?
Yes—the galvanic cell module is tool-free replaceable in under 90 seconds, with automatic sensor recognition and zero-offset recalibration initiated on power-up.
Does the CG1000 support data logging without a PC connection?
Yes—internal memory stores up to 10,000 timestamped readings with configurable logging intervals from 1 second to 60 minutes.
What documentation is provided for regulatory compliance reporting?
Each unit ships with a Certificate of Conformance, NIST-traceable calibration report, and optional IQ/OQ protocol templates compliant with FDA, EMA, and ISO 13485 requirements.
