ESU Gas Detected Detection Range Alarm 1 Alarm 2 Increments Part # NH3 (Ammonia) 0 ‑ 75.0 ppm 25.0 ppm 50.0 ppm 0.5 ppm GD‑70D‑NH3 AsH3 (Arsine) 0 ‑ 0.20 ppm 0.05 ppm 0.10 ppm 0.001 ppm GD‑70D4A‑ASH3 BCl3 (Boron trichloride) 0 ‑ 15.0 ppm 5.00 ppm 10.0 ppm 0.1 ppm GD‑70D‑BCl3
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