Eranntex MIC-500S-CL2 Fixed-Mount Chlorine Gas Detector

Overview

The Eranntex MIC-500S-CL2 is a fixed-mount, industrial-grade chlorine (Cl₂) gas detector engineered for continuous, real-time monitoring in hazardous and process-critical environments. It employs a high-stability electrochemical sensing cell—calibrated specifically for chlorine gas detection—ensuring reliable quantification across low-ppm occupational exposure limits (e.g., OSHA PEL = 0.5 ppm, NIOSH REL = 0.5 ppm) and higher-range process safety thresholds. Unlike portable or diffusion-only units, the MIC-500S-CL2 supports multiple sampling configurations—including free-diffusion, pipe-mounted, and pump-aspirated operation—enabling integration into ventilation ducts, scrubber effluent lines, chlorination rooms, water treatment basins, and chemical storage zones. Its intrinsically robust architecture complies with international functional safety expectations for fixed gas detection systems, delivering repeatable measurements under variable ambient conditions while maintaining long-term baseline stability through automatic zero tracking and multi-point calibration routines.

Key Features

• Explosion-proof housing certified to Exd IIC T6 Gb (CNEx17.3959), suitable for Zone 1/21 hazardous areas per IEC 60079 series
• Triple-layer electromagnetic immunity: compliant with EN 61000-4-2 (ESD), -4-3 (RF radiated), -4-4 (EFT), and -4-5 (surge) standards
• Dual-output architecture: simultaneous 4–20 mA analog output (3-wire or 4-wire) and RS485 Modbus RTU digital communication
• Configurable alarm logic: two independent relay outputs (SPDT, 250 VAC/30 VDC, 5 A resistive), supporting pre-alarm, high-alarm, and fault-level tripping
• Infrared remote configuration: 15-meter operational range eliminates need for enclosure opening during routine calibration or parameter adjustment
• Modular signal interface: optional voltage outputs (0–5 V, 0–10 V), wireless modules (GPRS, Wi-Fi, 433 MHz RF), and TCP/IP gateway compatibility for SCADA/MES integration
• Field-serviceable design: hot-swappable sensor cartridges, tool-free terminal blocks, and standardized M12 or PG13.5 cable entries

Sample Compatibility & Compliance

The MIC-500S-CL2 is optimized for chlorine gas but shares platform-level compatibility with over 30 toxic and combustible gases via interchangeable sensor modules—including H₂S, CO, NH₃, SO₂, NO₂, O₂, CH₄, and VOCs—using electrochemical, catalytic bead, NDIR, PID, or thermal conductivity technologies. All sensors are sourced from globally recognized manufacturers (Honeywell, Figaro, City Technology, Alphasense, Dynament, Membrapor) and undergo factory traceable calibration against NIST-traceable standards. The device conforms to GB 15322.1–2019 (Chinese standard for combustible gas detectors), GB 3836.1/2–2010 (explosion protection), and meets EMC requirements per GB/T 18268.1–2010. While not FDA 21 CFR Part 11 or ISO 17025 accredited out-of-box, its data logging and audit trail capabilities (via optional Eranntex MIC2000 controller) support GLP/GMP-aligned deployment when integrated into validated monitoring networks.

Software & Data Management

The MIC-500S-CL2 operates as a field node within scalable gas monitoring infrastructures. It natively supports Modbus RTU over RS485, enabling direct integration with PLCs (Siemens S7, Allen-Bradley ControlLogix), DCS systems, and third-party SCADA platforms (Ignition, WinCC, Citect). Eranntex provides a free Windows-based upper-computer software (MIC-View) that enables real-time concentration visualization, historical trend plotting, alarm event logging, and CSV export for regulatory reporting. When paired with the MIC2000 central controller, the system adds user access control, electronic signature support, change management logs, and automated calibration certificate generation—facilitating compliance with ISO 45001, ISO 14001, and local environmental agency mandates (e.g., EPA Method 21, EU Directive 1999/32/EC). Remote firmware updates and configuration backups are supported via USB or network interface.

Applications

• Water and wastewater treatment plants: continuous monitoring of chlorine residual in disinfection contact tanks, chlorination chambers, and dechlorination units
• Chemical manufacturing facilities: leak detection at chlorine cylinder storage, vaporizer outlets, and reactor feed lines
• Pharmaceutical clean utilities: verification of chlorine-based sanitization cycles in purified water (PW) and water-for-injection (WFI) distribution systems
• Food & beverage processing: validation of chlorine concentration in CIP rinse stages and surface sanitation sprays
• Power generation: monitoring of chlorine injection points in cooling tower make-up water and condenser tube cleaning circuits
• HVAC air handling units: integration into demand-controlled ventilation (DCV) logic for indoor air quality (IAQ) assurance in laboratories and industrial kitchens

FAQ

What is the default detection range for chlorine on the MIC-500S-CL2?

The standard configuration is 0–10 ppm Cl₂, optimized for occupational health monitoring. Extended ranges (e.g., 0–100 ppm, 0–1,000 ppm) are available upon request and require sensor recalibration and documentation.
Can this detector be used in outdoor, rain-exposed installations?

Yes—the IP65-rated enclosure provides protection against water jets and dust ingress. For prolonged exposure to direct rainfall or high-humidity condensation, specify the optional rain hood or request a custom conformal-coated PCB variant at order stage.
Is third-party calibration certification available?

Eranntex provides factory calibration certificates traceable to national standards. For ISO/IEC 17025-accredited calibration, users must engage an external accredited lab; the device’s modular sensor design facilitates off-site calibration without full unit replacement.
Does the unit support HART protocol?

No—HART is not natively supported. However, 4–20 mA output can be interfaced with HART-enabled smart transmitters or asset management systems via analog input cards with HART multiplexing capability.
What maintenance intervals are recommended for routine operation?

Zero and span checks every 3–6 months; full sensor replacement every 24–36 months depending on exposure history, temperature cycling, and humidity levels. Sensor life is accelerated in environments with high ozone, hydrogen sulfide, or solvent vapors.