Gas Detector Calibration
Calibration is never as important as with safety equipment, so it's important to make sure your provider is qualified and certified. Thorcal's engineers have current Level 1 and Level 2 service certificates and Thorcal is an authorised service centre for BW personal gas monitors.
If you have the correct concentrations of Traceable test gas, a regulator and appropriate connectors/pipe, you'll be able to perform a calibration or bump check on most monitors by closely following the manufacturer's instructions. However, it's often better to refer your monitors to gas detection specialists such as Thorcal to complete the calibration.
We will thoroughly check the function and condition of your detector, apply traceable test gas and recalibrate the sensors. You'll receive a calibration certificate that's Traceable to National Standards.
If your monitor has an LEL sensor fitted, it's important to "bump check" your monitor before every use. This is because LEL sensors can become "blind" to certain explosive gases if exposed to contaminating chemicals.
You bump check your monitor by applying gas to the sensors and making sure they alarm at the appropriate levels.
This is not the same as a calibration, as it's just a check on the function of the sensors, not a readjustment based on the concentrations of gas.
Test gas should be Traceable to National Standards and come with a certificate of conformity. You should be able to see the certificate number from the test gas used on your calibration certificate under traceability information.
Thorcal can supply all concentrations of test gas and calibration gas. Contact us with your requirements
Does your monitor have a PID sensor to see exotic gases? PID (photoionisation devices) use ultraviolet light to detect gases that aren't detectable by other methods.
While PID sensors tend to have much longer lifespan than electrochemical sensors, the lens to the PID lamp needs periodic cleaning and servicing to ensure it operates correctly.
Thorcal can service all PIDs during the calibration process
Thorcal will apply the most recent firmware updates to your monitor during the calibration.
Pumped or Diffuse Gas Detectors
Monitors like the BW Microclip series or Crowcon T4 use the diffusion method of gas detection. This means that the monitor doesn't actively draw in the gas from the atmosphere, it only detects what is diffusing around it. These detectors are meant to be worn on the breast, near to the mouth. This way your detector is exposed to the same atmosphere are you are.
Pumped units have a small pump module that actively draws in the atmosphere. You may want to use these to sample gas from a tank, or enclosed space using a tube attachment before entering, or from a drain to detect any leaks.
Fixed Gas Detection Systems
Thorcal's site engineers have worked on Crowcon, Draeger, Analox, BOC and other leading brands of fixed gas detection system.
We can provide short notice callout to your system to assess faults, or calibrate fixed sensor heads. We calibrate LEL detectors, SO2, Ammonia, Hydrogen, O2 and others.
Our gas engineers are experienced in SIL checking fixed systems, ensuring integrity of your gas detection equipment.
Hire Gas Detectors
We keep a fleet of personal gas monitors for short, long term and permanent hires. Find out more how you could save money by hiring gas detectors from us.
Buy Gas Monitors
As an authorised distributor for Honeywell safety products, Thorcal are able to source any monitors you may need, including all parts and accessories. Make Thorcal your first stop for buying gas detection equipment. Find out more
Gas Detector Repair
Most gas detection sensors have an operational lifespan, after which they expire and need to be replaced.
Thorcal carry stocks of all parts for the leading manufacturers of gas monitors, and can replace failed sensors.
If your monitor fails calibration due to a failed sensor, we'll produce a fault report and quote for the repairs and gain your approval before going ahead.
Thorcal will inspect the sensor filters on your personal gas monitor and quote you for replacement if needed.
Sensors are sensitive to water ingress or contamination by damaging chemicals. If the sensor port is blocked by dirt, the detector won't be exposed to the atmosphere, so will be unable to see gas.
Filters are one of the most inexpensive parts on a gas monitor to replace, but very important if your monitor is to function correctly.