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CROWCON
| CUSTODIAN | Gas Detector | |
| GASMAN | Oxygen Indicator | |
| Sprint Pro | Flue Gas Analyser | Subcontract |
| T4 | Gas Detector | Subcontract |
| T4 | Gas Detector | Subcontract |
| T4 Type 2 | Gas Detecotr | Subcontract |
| TETRA | Portable Gas Detector | |
| Tetra 4 | Gas Detector | Subcontract |
| Tetra:3 | Gas Detector | Subcontract |
| TRIPLE PLUS | Gas Monitor | |
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