The AMETEK Western Research 931 is a single-gas ultraviolet (UV) analyzer designed for continuous hydrogen sulphide (H₂S) measurement in demanding process environments. Its fixed-optics UV spectrometer eliminates interference from water vapour and CO₂, providing fast and stable readings with minimal maintenance.
Housed in a Class I, Div. 1 explosion-proof enclosure, the 931 operates as a hot-wet analyzer with a heated cell oven and integrated sample system to prevent condensation or plugging. With no moving parts and minimal span drift, it delivers reliable long-term performance for sulphur recovery and sour gas pipeline applications.
Key Features
- Fixed optical configuration with pulsed UV lamps
- High resolution (≤0.02 nm) and excellent linearity
- Hot-wet operation prevents condensation and flooding
- Low maintenance, no moving parts
- Optional TCD module for hydrogen (H₂) measurement
- Configurable for H₂S, SO₂, COS, CS₂, or NH₃
- Class I, Div. 1 explosion-proof design
