This article provides an overview of the operation, accuracy, and reliability of Blackline Safety’s electrochemical hydrogen fluoride (HF) sensor.
The HF sensor was chosen and tested for its high sensitivity to hydrogen fluoride gas, ambient-air stability, and optimized detection of halide gases. It can be configured as a single-gas sensor or as part of a multi-sensor array.
The multi-sensor configuration is strongly recommended for hazardous material and other environments where mixed halide and toxic gases may be present.
The sensor has a broad operating temperature and relative humidity range, making it suitable for a variety of environments.
The sensor is optimized to detect low concentrations of:
The three halide gases—hydrogen fluoride, chlorine, and hydrogen chloride—are corrosive and strong irritants to the skin, eyes, and respiratory system.
If any halide gas is detected, Blackline recommends taking immediate action to prevent exposure.
Specific environmental factors can impact HF sensor performance, potentially affecting its accuracy and reliability.
Sensor poisoning occurs when prolonged exposure to certain chemicals irreversibly damages the sensor and prevents it from detecting gas accurately.
Common sources of sensor poisoning include:
Exposure to hydrogen sulfide gas can temporarily inhibit the HF sensor, causing it to display a negative reading or enter an Under Limit (UL) condition. This prevents the sensor from accurately detecting hydrogen fluoride gas until it recovers.
Sensor inhibition can be reversed by relocating the device to an environment with clean air. Recovery takes 4-8 minutes, and the device can remain powered on.
Exposure to carbon dioxide (CO₂) over time can slow sensor response and reduce sensitivity. This gradual decline may lead to inaccurate gas readings in certain environments.
If you suspect the sensor’s performance or accuracy is compromised, recalibrate it. If recalibration fails, contact Blackline Customer Care for assistance.
Due to hydrogen fluoride’s corrosive nature, users should avoid handling it directly. Blackline uses chlorine gas for calibration and bump testing. This minimizes HF exposure risks while maintaining sensor accuracy.
Hydrogen fluoride is a highly toxic, corrosive gas that requires immediate attention in the event of uncontrolled exposure.
Properly configuring your Blackline device to detect ppm levels of halide gases provides a fast and reliable warning. Accurate detection allows users to respond quickly and reduce exposure risks.
For additional safety guidelines at your location, contact your local health and safety team or industrial hygienist.