Gas Detector Calibration & Bump Test Gas
Protecting Australian workers from Toxic Gases and Oxygen-Deficiency
Gas detectors are a vital first line of defense in hazardous environments, protecting workers from toxic gases, oxygen-deficient atmospheres, and explosive vapours. But like any sensitive instrument, gas monitors must be calibrated regularly to ensure they’re providing accurate, life-saving readings. Even a minor drift in sensor accuracy can have serious — or fatal — consequences.
Zokal Safety Services offers professional calibration of portable and fixed gas detection equipment, ensuring your devices meet the manufacturer’s specifications and Australian Standard AS/NZS 60079.29.2. With over 35 years of experience servicing safety-critical instruments, we help you ensure that every reading is trustworthy — and every worksite is safe.
Core Calibration Services:
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Certified Calibration of Portable & Fixed Gas Detectors for all major gas types and detection brands.
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Bump Test Gas Supply & Functional Testing to verify daily device response.
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Compliance with AS/NZS 60079.29.2 and manufacturer-recommended calibration intervals.
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In-House or On-Site Calibration Services to minimise downtime.
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Documentation & Calibration Certificates Provided for audit, insurance, and WHS compliance.
Our Services
- ➤ Inspection and Services
- ➤ Anchor Point and Static Lines
- ➤ CABA Decontamination
- ➤ CABA Quickfill Stations Refurbishing
- ➤ Confined Space Equipment
- ➤ Fall Arrest Block / Recovery Winch Servicing
- ➤ Fire Safety Equipment
- ➤ Gas Detector Calibration & Bump Test Gas
- ➤ Height Safety Equipment
- ➤ Industrial Lifting Equipment
Additional Services We Provide:
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Full calibration for sensors detecting oxygen, carbon monoxide, hydrogen sulfide, methane, LEL, VOCs, and other gases.
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Test gas cylinders and regulators supplied for bump testing routines.
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Multi-gas detector and single-gas monitor servicing.
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Battery checks, filter replacement, and firmware updates.
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Equipment servicing for leading brands including MSA, Honeywell, BW, Dräger, Riken Keiki, Industrial Scientific, and more.
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Sensor response testing under controlled conditions using certified gas.
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Calibration reminders and device service tracking available for fleet management.
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Hire and sales of gas detection equipment, including confined space entry kits.
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Integration with breathing apparatus and confined space equipment servicing schedules.
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Fast turnaround and support from our NSW-based calibration facility.
Need calibration or bump test gas? Contact Zokal today to keep your gas detection accurate, compliant, and life-saving.
Contact Zokal Today on (02) 4960 9611 for a Free, No Obligation Consultation
Our Certifications





Authorised & Certified Service Centre for









Why Gas Detector Calibration Matters
Gas detectors rely on delicate sensors that degrade over time — especially when exposed to humidity, temperature swings, dust, and chemical vapours. Calibration ensures that sensor output remains accurate, and that alarm set points are triggered at the correct concentrations.
AS/NZS 60079.29.2 and all major gas detector manufacturers recommend:
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Calibration at least every 6 months (more frequently in high-risk conditions)
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Daily bump testing before use to ensure the unit is functioning properly
Failure to perform these checks can result in false readings, delayed alarms, or total failure to detect a life-threatening atmosphere. Zokal ensures that your detectors are not just working — they’re calibrated, verified, and compliant.
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Zokal is the Supplier of ZOGAS for Accurate Calibration and Bump Testing of all Gas Detectors.
At Zokal we can supply specialised gases and gas mixtures to meet various and specific requirements. We work with you to understand your application and analyse your consumption patterns. This way we can offer the correct cylinder size that maximises your efficiency while minimising costs.
We supply High Purity Carrier gases up to 99.999% pure. Our range includes hydrocarbon gases, chemical gases, halocarbons, rare gases and many other gases for research and industry. These gases can be supplied in a range of cylinders up to 200bar in pressure. Contact us for a list of available gases in high pressure cylinders.
Zokal can supply custom made high precision gravimetric calibration gas mixtures and high purity gases, in a range of both compact light weight or much larger type cylinders.
Calibration Gases are manufactured gravimetrically to ISO 6142 and all aluminium cylinders conform to EN12205 / ISO 11118 and are traceable to NPL, UKAS and NIST.

112 Litre Aluminium Non-Refillable Cylinder
“ Twice the gas, same size ”
The 112 Litre Aluminium Non-Refillable Cylinder is the ideal choice as it offers the lowest cost per Litre among all calibration gases disposable cylinders.
- Readuces purchasing costs
- Reduces shipping costs
- Improves efficiency of technicians
- Reduces internal handling
- Lowest cost per litre
- Saves the environment
24 months warranty for our range of H2S, SO2 & NH3 calibration gas mixtures
WARRANTY
Non-reactive gases | 36 months |
Ethanol | 24 months |
H2S, SO2 , NH3 and 4 gas mixtures (H2S & SO2 only) | 24 months |
NO, , HCN, ETO | 12 months |
Cl2 (min 5ppm) | 9 months |
HCl (min 5ppm) | 8 months |
NO2 | 6 months |
“ Twice the gas, same size ”
65 Litre Aluminium Non-Refillable Cylinder is the newest addition to our calibration & Test gases product range. It is ideal for confined space entry kits because of its identical physical size to the much smaller 34L cylinder.
- Eliminates all 58 litre cylinders
- Reduces purchasing and shipping costs
- Reduced Waste Helps the Environment
- Same physical size as 34 litre cylinders
- Saves 20% on cost of two 34 litre cylinders
- Fits into Confined Space Kits
103 Litre Steel Non-Refillable Cylinder
The 103 Litre Steel Portable Cylinder is our most popular cylinder for non-corrosion mixtures e.g. CH4, CO, CO2, N2, O2, etc. It is widely used in calibration gas kits to challenge and test gas detectors around plants.
WARRANTY
Non-reactive gases | 36 months |
High Pressure Gas Cylinders
A range of gas cylinders with no rental costs for laboratory gas, Gas Chromatograph (GC) Gas & general calibration and test gases.

50 Litre Aluminium High Pressure Cylinder
Aluminium Cylinders mainly used for reactive gases
The 103 Litre Steel Portable Cylinder is our most popular cylinder for non-corrosion mixtures e.g. CH4, CO, CO2, N2, O2, etc. It is widely used in calibration gas kits to challenge and test gas detectors around plants.
WARRANTY
Non-reactive gases | up to 36 months |
H2S, SO2 and 4 gas mixtures | 24 months |
NO,NH3, HCN, ETO | up to 24 months |
Cl2 (min 5ppm) | 12 months |
HCl (min 5ppm) | up to 12 months |
NO2 | 12 months |
50 Litre Steel High Pressure Cylinder
Steel Cylinders mainly used for non reactive gases
WARRANTY
Non-reactive gases | up to 36 months |
H2S, SO2 and 4 gas mixtures | 24 months |
NO,NH3, HCN, ETO | up to 24 months |
Cl2 (min 5ppm) | 12 months |
HCl (min 5ppm) | up to 12 months |
NO2 | 12 months |

A range of regulators is available from Zokal

Bump Test Station – High Pressure Programmable

Bump Test Station – High Pressure
