Bump tests and Calibration with Chlorine

Previously, G7 Dock did not support the bump test or calibration with chlorine. After testing, we have found a solution to allow G7 Dock to successfully bump test and calibrate with chlorine.

About chlorine

To further expand our product line and to help improve safety in the field, G7 now supports chlorine gas sensors. As exciting as it is to be able to detect chlorine, this new sensor comes with its own unique challenges that are not seen while using our other gas sensors. Chlorine is considered a “sticky gas.” This means that it releases slower than other gases, and adheres to surfaces that it comes into contact with. When performing bump tests and calibrations, chlorine's tendency to adhere to surfaces causes gas responses that are lower than expected.

Bumping and calibrating with chlorine

Due to the fact that the sensitivity of the sensor is highly dependent on the gas delivery and composition of materials, Blackline recommends completing all bump tests and calibrations in either a G7 Dock or manually, and to avoid mixing the two methods.

Bump tests and calibrations in G7 Dock

To successfully bump test and calibrate with Chlorine in G7 Dock, Blackline recommends:

  • Viton DFR stainless steel demand flow regulator
  • Use G7 Dock’s default pump speed (48%)
  • Teflon lined tubing

Manual bump tests and calibrations

To successfully bump test and calibrate manually, Blackline recommends:

  • 0.5L/min stainless steel fixed flow regulator (ACC-REG-0.5L-SS)
  • Teflon lined tubing


For additional questions on chlorine, to order these regulators or for any other inquiries don't hesitate to contact our Customer Care team.