Tianhong TH-2200 Workplace Toxic & Hazardous Gas Alarm System

Overview

The Tianhong TH-2200 Workplace Toxic & Hazardous Gas Alarm System is an integrated, real-time environmental monitoring platform engineered for continuous detection and alarm response in industrial, laboratory, and occupational settings. It operates on the principle of selective electrochemical sensing—leveraging proprietary intelligent electrochemical sensor modules that autonomously identify type, range, calibration history, service life, and maintenance status upon insertion. Designed to comply with China’s occupational exposure limit standard GBZ 2.1–2007, the system continuously monitors up to 16 target gases simultaneously (standard configuration supports four channels), including sulfur dioxide (SO₂), nitrogen monoxide (NO), nitrogen dioxide (NO₂), carbon monoxide (CO), and ozone (O₃). When measured concentrations exceed user-defined or regulatory thresholds, the TH-2200 triggers multi-modal alerts and can interface with external ventilation, exhaust, or air purification systems via programmable digital outputs—enabling automated hazard mitigation without manual intervention.

Key Features

• Intelligent plug-and-play electrochemical sensors with auto-recognition of calibration parameters, operational lifespan, and maintenance scheduling—eliminating manual sensor configuration and minimizing downtime.
• 15-inch high-resolution IPS capacitive touchscreen (480 × 800 pixels) supporting intuitive navigation, real-time waveform visualization, threshold adjustment, and system diagnostics—all accessible without external software or PC connection.
• Modular gas channel architecture supporting up to 16 simultaneous analytes; factory-configured for four gases with field-upgradable expansion via certified sensor modules.
• Integrated MEMS-based mass flow sensor ensuring stable, temperature-compensated sampling at 500–800 mL/min (±1.5% accuracy), critical for maintaining measurement repeatability under variable ambient conditions.
• Comprehensive I/O interface suite: four isolated digital switch outputs (dry contact), two USB 2.0 ports, and two RS-232/RS-485 serial interfaces—enabling seamless integration with PLCs, SCADA systems, DCS networks, and building management systems (BMS).
• Multi-level alarm activation: visual (LED strobe + on-screen highlight), audible (adjustable 85 dB buzzer), and electrical (relay-triggered control signals)—fully configurable per gas channel and alarm severity level.
• Ruggedized enclosure rated IP3X (optional ATEX/IECEx-certified explosion-proof EX-d IIB T4 variant available for Zone 1/21 hazardous areas).

Sample Compatibility & Compliance

The TH-2200 is validated for ambient air and workplace indoor environments where toxic gas accumulation poses acute health risks. It is not intended for use in corrosive, high-humidity (>95% RH non-condensing), or particulate-laden airstreams without optional pre-filtration. All sensor modules meet RoHS and REACH directives. The system conforms to national electromagnetic compatibility (GB/T 6113) and electrical safety (GB/T 16499) standards. Its exposure limit logic is preloaded with permissible concentration thresholds from GBZ 2.1–2007, but allows full user customization to align with site-specific risk assessments, ISO 8573-1 purity classes, or internal occupational health protocols. While not FDA 21 CFR Part 11–certified out-of-the-box, audit-ready event logs—including alarm timestamps, sensor drift alerts, calibration records, and operator actions—are stored locally with tamper-evident metadata for GLP/GMP-aligned documentation.

Software & Data Management

The TH-2200 embeds a Linux-based real-time operating system with secure firmware partitioning and over-the-air (OTA) update capability. Internal non-volatile memory retains ≥30 days of second-by-second concentration data, alarm events, and system status logs—even during power interruption. Data export is supported via USB mass storage mode (CSV format) or serial ASCII protocol for integration into enterprise LIMS or EHS platforms. Optional cloud gateway module enables TLS-encrypted telemetry transmission to centralized dashboards with role-based access control, geotagged incident reporting, and automated compliance summary generation. All configuration changes are logged with operator ID, timestamp, and pre-/post-value deltas—supporting traceability requirements under ISO 45001 and China’s Occupational Safety and Health Law.

Applications

• Chemical manufacturing facilities monitoring solvent vapors and reaction by-products in production lines and storage zones.
• Wastewater treatment plants detecting H₂S, Cl₂, and NH₃ near aeration basins, sludge handling areas, and enclosed pump stations.
• Pharmaceutical cleanrooms verifying ambient CO and NOₓ levels during HVAC commissioning and routine validation.
• Underground parking garages implementing demand-controlled ventilation based on real-time CO accumulation trends.
• Research laboratories using volatile reagents where localized leak detection and immediate local exhaust activation are required.
• Municipal utility tunnels and subway maintenance depots ensuring worker safety during confined-space entry operations.

FAQ

Does the TH-2200 support remote calibration verification?
Yes—via built-in zero/span check routines triggered manually or scheduled automatically. Calibration gas concentrations and timestamps are recorded in the audit log.
Can sensor modules be interchanged between TH-2200 units without recalibration?
Yes—each sensor contains embedded EEPROM storing individual calibration coefficients and lifetime counters; hot-swap operation preserves measurement integrity.
Is the 15-inch display suitable for glove-operated use in industrial environments?
The touchscreen supports gloved-finger operation with adjustable touch sensitivity and haptic feedback confirmation for critical actions.
What is the typical service life of the electrochemical sensors?
Standard sensors exhibit 24–36 months of stable performance under normal workplace conditions (25 °C, 40–60% RH); extended-life variants are available for high-concentration or low-temperature applications.
How does the system handle cross-sensitivity between NO and NO₂?
Each sensor is individually compensated using factory-derived interference matrices; dual-channel NO/NO₂ configurations apply real-time algorithmic correction based on co-measured concentrations.