Fixed Chlorine Detector

The GS8601-CL2 is a fixed-point UV-DOAS chlorine gas detector that applies optical absorption to area monitoring and leak-detection duty. The published range is 0–50 ppm Cl₂ with ±5% of reading or ±0.05 ppm accuracy and a <10s T90 response; outputs are 4-20mA, RS-485 Modbus, and 3 relays.

It provides three configurable alarm relays with setpoints matched to the site TWA, STEL, or IDLH policy, plus an integrated audible/visual alarm beacon. Up to 16 units can be daisy-chained on the RS-485 bus, and the detector self-diagnoses with automatic fault reporting.

Placement should follow a gas-phase review for chlor-alkali, storage, loading, and water-treatment safety areas. SO2, HCl, and HF spectral overlap can require a matrix review in mixed acid-gas areas; ClO2 or other UV-absorbing chlorine compounds should be reviewed separately from Cl2; and aerosols, fog, or condensation near the detector can affect the UV optical response.

No on both counts. It is a fixed-point safety detector: process-analyzer duty above the declared 0–50 ppm safety range is outside its envelope, and aqueous residual chlorine measurement is outside the gas-detector boundary — that water-domain work belongs to the GS-WCL panel family.

It uses an ATEX Zone 1 flameproof enclosure with an IP66 ingress rating. Hazardous-area scope beyond ATEX Zone 1 is not declared in the v1 source data, so installation outside the ATEX Zone 1 or IP66 assumptions requires a separate certification review.

CE, ATEX, and SIL 2 approvals are listed, with an ATEX Zone 1 flameproof enclosure and an IP66 ingress rating. The SIL 2 proof-test details are not stated in the v1 source data, so the functional-safety case should be confirmed during engineering review.