1. Background:

A biopharmaceutical company's active pharmaceutical ingredient (API) production workshop has 10 5m³ stainless steel ethanol storage tanks and associated pipelines for drug synthesis and extraction processes. Ethanol is a Class A flammable liquid with an explosion limit of 3.3%~19% (volume fraction). In the event of a leak, it can easily form an explosive gas mixture, posing a significant safety hazard. The company needs to establish a comprehensive leak monitoring and explosion-proof safety system to achieve real-time early warning, automatic response, and coordinated control to prevent explosions.

2. Parameter Requirements:

Equipment Type | Technical Parameters | Function

Ethanol Gas Detector | Measurement range 0~100%LEL, accuracy ±3%FS, response time <30s | Real-time detection of ethanol vapor concentration in the environment; triggers alarm when concentration exceeds the limit.

Explosion-proof Audible and Visual Alarm | Volume ≥110dB, flashing frequency 1Hz | On-site audible and visual warning to remind personnel to evacuate.

Emergency Shut-off Valve | Pneumatic/electric type, explosion-proof rating Ex d II CT4 | Automatically shuts off the tank discharge pipeline after receiving an alarm signal.

Explosion-proof Exhaust Fan | Air volume ≥10000m³/h, explosion-proof rating Ex d II BT4 | Linked start-up to quickly dilute leaked ethanol vapor.

3. Solution:

Fixed ethanol gas detectors every 5 meters.

1. Level 1 Warning (Concentration ≥25%LEL): Controller pop-up alarm, on-site audible and visual alarm activated, prompting inspection personnel to investigate the leak point.

2. Level 2 Warning (Concentration ≥ 50% LEL): Automatically triggers the emergency shut-off valve of the storage tank to close, and simultaneously starts the explosion-proof exhaust fan for forced ventilation and dilution.

4. Matching Product:

Fixed Ethanol Gas Detector Alarm MIC-500S-C2H6O-LEL-A