Applied Markets
Installed Gases
Project Details
Hi from GasTiger! Today: FIX800 for toxic HCl (hydrogen chloride). HCl appears across semiconductor, chemical, pharmaceutical, and food plants—strict control is mandatory.

Leakage benchmarks
TWA: time-weighted average for a workday.
STEL: short-term excursion limit.
Because harm can occur near 1 ppm, low-concentration accuracy is critical.

This application monitored HCl after a scrubber. We applied a 0–10 ppm low-range sensor plus moisture pretreatment.

FIX800 uses diffusion sampling at the probe, but we routinely add pretreatment trains to match site humidity and dust. RS-485 and 4–20 mA outputs are available.


The low-span configuration resolves about 0.01 ppm.

We provided 1/4" SAE ports on the control enclosure for hose and service tubing (sample draw and exhaust).

Besides HCl, FIX800 supports HF, F2, Cl2, HCN, and many other toxic channels—mix and match to your hazard review. Thanks for reading this HCl installation note.