Description
Honeywell MIDAS-E-HCL
Technical Specifications
- Detected Gas: Hydrogen Chloride (HCl)
- Measurement Range: 0 ppm to 8 ppm
- Resolution: 0.1 ppm
- Warm Up Time: Less than 10 minutes
- Operating Temperature: 0°C to +40°C
- Storage Temperature: 5°C to +25°C
- Operating Humidity: 10% to 90% RH non-condensing
- Operating Pressure: 90kPa to 110kPa
- Expected Service Life: Minimum 24 months under typical operating conditions
- Communication Interface: MIDAS internal cartridge bus
- Certification: CE, SEMI S2, IECEx
Functional Features Automatic cartridge recognition and configuration loading by MIDAS main unit. Built-in temperature compensation circuit stabilizes measurement value under fluctuating ambient temperature. It transmits real-time gas concentration, sensor health status and flow abnormality signal to host controller. It supports zero calibration and span calibration with certified hydrogen chloride standard gas. It generates fault alarm when sensing cell fails or flow channel is blocked. It supports hot swap replacement without shutting down MIDAS detector power supply. It has internal flow restrictor to match MIDAS sample pump flow parameter.
Application Scenarios Semiconductor wafer manufacturing HCl etching process gas monitoring Cleanroom toxic gas storage cabinet leak detection Chemical laboratory hydrochloric acid fume hood area monitoring Metal surface treatment workshop acid gas monitoring Battery production corrosive gas leakage monitoring MIDAS gas detector spare HCl sensor cartridge replacement
Performance Parameters
- Measurement Accuracy: ±10% of reading or ±0.2ppm, whichever is greater
- Long Term Drift: Less than ±10% of measured value within six months
- Response Time T90: Less than 60 seconds
- Temperature Zero Drift: Less than ±0.05ppm / °C
- Temperature Sensitivity Drift: Less than ±3% of measured value / °C
- Mean Time Between Failures: 700000 hours
Material Composition Corrosion resistant PPS plastic cartridge housing Electrochemical hydrogen chloride sensing cell SMT signal conditioning PCB with non-volatile memory chip Precision thermistor for temperature compensation Gold plated contact pins for power and data communication PTFE hydrophobic filter membrane on gas inlet Fluorine rubber sealing O-ring and corrosion resistant flow channel
Structural Features Integrated pluggable cartridge structure compatible with MIDAS side installation slot. Front gas inlet and outlet ports connect with sample draw tubing from monitored area. Rear gold contact pins connect with main transmitter internal circuit. Internal flow channel adopts corrosion resistant material to resist HCl gas erosion. Sealing O-ring isolates sample gas from electronic circuit compartment. Anti-key notch prevents wrong gas cartridge installation.
Working Principle MIDAS internal sampling pump draws air sample into cartridge flow path. Hydrogen chloride gas diffuses into electrochemical sensing cell and produces current signal proportional to gas concentration. Signal conditioning circuit amplifies and compensates raw signal, then converts analog signal into digital value. Memory chip transmits sensor data and calibration information to MIDAS main controller. Host unit judges alarm state and uploads alarm signal to plant monitoring system when concentration exceeds threshold.
Installation Requirements Cut off MIDAS host power before cartridge replacement. Remove old cartridge from side slot. Insert MIDAS-E-HCL cartridge fully until locking position. Restore power and wait for automatic recognition and warm up period. Complete zero calibration in clean fresh air and span calibration with certified HCl standard gas. Inspect sample tubing and fitting for gas leakage after commissioning.
Usage Notes Hydrogen chloride is corrosive toxic gas, all maintenance work must wear proper PPE. Do not expose cartridge to high concentration alkaline vapor or organic solvent which poisons sensing cell. Replace cartridge immediately after service life expires. Prevent liquid condensate from entering internal flow channel. Keep spare cartridge sealed in original packaging and stored in cool dry environment.
