Certified Calibration Gas

The only approved way to test and calibrate a gas sensor.


"We Make Our Chlorine Gas Or Use Granular Pool Chlorine To Save Money"

Testing and calibrating a life saving device is no place to cut corners to save money.

"Home Made" materials are not approved for testing or calibration by any safety organization or federal regulation.

"Home Made" materials can't calibrate a gas sensor or detector because they have unknown, variable concentrations.

Excess concentrations can overload and damage a sensor.

Testing gas sensors with unapproved gases jeopardizes operators.

Foxcroft offers certified calibration gas to test and calibrate your gas detector properly in compliance with recommendations.

Functional (Bump) Test

The Industrial Safety Equipment Association (ISEA) definitions on calibrating sensors in portable devices provides good guidance for testing any sensor.

The ISEA defines a bump test as:

"A qualitative function test in which a challenge gas is passed over the sensor(s) at a concentration and exposure time sufficient to activate all alarm indicators to present at least their lower alarm setting.

"The purpose of this test it to confirm that gas can get to the sensor(s) and that all the alarms present are functional.

"This is typically dependent on the response time of the sensor(s) or a minimum level of response achieved, such as 80% of gas concentration applied. Note this check is not intended to provide a measure of calibration accuracy".

Calibration Check

ISEA defines this as:

"A quantitative test using a known traceable concentration of test gas to demonstrate that the sensor(s) and alarms respond to the gas within manufacturer's acceptable limits. This is typically ±10% to ±20%  of the test gas concentration applied unless otherwise specified by the manufacturer".

Full Calibration

ISEA defines this as:

"The adjustment of an instrument's response to match a desired value compared to a known traceable concentration of test gas. This should be done in accordance with the manufacturer's instructions".