Certified 2.5% volume methane-in-air calibration gas (approx. 50% LEL) – the standard span point for combustible-gas detector calibration.
The CAC 103DS2.5VCH4A is a methane-in-air span gas set at the concentration most manufacturers specify for combustible-gas calibration. Sitting at around half the lower explosive limit, it exercises a detector across the mid-scale range where accuracy matters most during a genuine gas event.
Most portable and fixed flammable-gas monitors are designed to be spanned at 50% LEL. Using the 103DS2.5VCH4A keeps your calibrations aligned with the equipment maker’s recommendations, so alarm thresholds behave exactly as intended in the field.
In mining, wastewater and confined-space work a correctly spanned detector is often the last line of defence. A certified, repeatable methane blend means those readings can be trusted shift after shift.
Combine it with a CAC FF-100 fixed-flow regulator for accurate delivery. Contact Hinco Instruments, your local CAC supplier in Perth, for pricing and stock.
| Target Gas | Methane (CH₄) |
|---|---|
| Concentration | 2.5% by volume (≈ 50% LEL) |
| Balance Gas | Synthetic Air |
| Cylinder Type | Disposable, non-refillable aluminium |
| Valve Connection | C10 (5/8"-18 UNF) |
| Shelf Life | 36 months from date of manufacture |
| Certification | Traceable to ISO 17034 / ISO 17025 |
| Physical State | Compressed gas – colourless, odourless |
| UN Number | 1956 (Compressed gas, N.O.S.) |
The CAC 103DS2.5VCH4A supplies a 2.5% v/v methane-in-air mixture (approximately 50% LEL) for span calibration of combustible-gas detectors:
Hinco Instruments is your authorised CAC specialty gas distributor in Perth, WA. Contact us for pricing, availability, cylinder options, and technical support.
Certified 1.0% volume methane-in-air calibration gas (approx. 20% LEL) for low-span verification and bump testing of combustible-gas detectors.
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Stainless-steel fixed-flow regulator (0.5 or 1 LPM) for delivering calibration gas from disposable CAC cylinders to gas detectors.
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Certified 100 ppm carbon monoxide calibration gas, balanced in nitrogen, for accurate bump testing and span calibration of CO gas detectors.
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