Hydrogen Fluoride 0.5/a, 0.5 - 15 PPM / 10 - 90 PPM, (8103251) Model 201 • Optional Drop-Tube assembly available

• Optional Drop-Tube assembly available for sampling from greater depths

Blackline Live — web-based monitoring software

Level Troll 400 Data Logger Applications

Hydrogen Sulfide 2/a

Hydrogen Fluoride 0.5/a, 0.5 - 15 PPM / 10 - 90 PPM, (8103251) Model 201 • Optional Drop-Tube assembly availableHydrogen Fluoride 0. 5 a, 0. 5 15 PPM 10 90 PPM, Part # 8103251, 10 Tests Application Range Standard Measuring Range: 0. 5 to 15 ppm 10 to 90 ppm Number of Strokes n: 10 2 Time for Measurement: approx. 2 min approx. 25 s Standard Deviation: 20 to 30 % Color Change: blue violet yellow Ambient Operating Conditions Temperature: 10 to 40 C Absolute Humidity: 30 to 80 % Reaction Principle HF + pH indicator yellow reaction product Cross Sensitivity Other