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Volatile Organic Compounds (VOCs)

RAE Systems is an innovator and the recognised industry leader in the development of photoionization detectors (PIDs). PIDs use ultraviolet (UV) rays to bombard gas samples and detect a broad range of VOCs such as formaldehyde, methane, and benzene, as well as hydrocarbons that typically occur in oil drilling and refining. These sensors provide an instant reading indicating whether gas is present. This makes PID sensors useful in go/no-go situations where personnel are unsure of what threats they face. RAE Systems offers PIDs that measure in parts-per-million (ppm), as well as specialised PIDs that are highly sensitive to low concentrations of VOCs, and can identify parts-per-billion (ppb). With fast and simple calibration and a large library of correction factors available for a variety of gases, our PIDs set the industry standard for reliability and accuracy.

Why Buy a VOC Monitor?

Volatile Organic Compound (VOC) monitors  are portable organic vapour monitors that utilise Photo Ionisation Detectors (PIDs). These can measure VOCs to extremely low concentrations (given suitable environmental conditions), with parts per billion (ppb) up to 10,000 parts per million (ppm) measurements possible. They can be utilised to measure a broad range of VOCs and can be combined with pre-filtering technology to accomplish benzene or butadiene specific measurements in mixed VOC applications.

They are most commonly used to assess exposure to VOCs in accordance with Control of Substance Hazardous to Health 1999 (COSHH regulations) and HSE EH40 which prescribes Workplace Exposure Limits (WELs). These WELs have legally binding status. If a substance is not prescribed under EH40, then its WEL can be found in its chemical Safety Data Sheet (SDS) under section 8. From EH40 or an SDSs Section 8, you will find Long Term Exposure Limits  expressed as an 8 hour Time Weighted Averages (TWAs) and Short Term Exposure Limits (STELs), expressed as a maximum allowable average exposure over a 15 minute period.

PIDs are further used for environmental clean-up. Here they are commonly used to perform soil headspace analysis, or indicators in vapour intrusion studies and indoor air quality testing.

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