930 H2S in Sulfur Pit Analyzer

The 930 H2S Vapour Space Analyzer was developed for sulfur pit storage applications. The 930 has been field proven as one of the industry’s most reliable instruments for monitoring H2S and SO2. The analyzer uses a proprietary high resolution UV technology in a dual beam, multiple wavelength configuration. Resolution better than 0.02 nm is provided by high intensity, line source lamps. These sources emit at a fixed wavelength, providing great measurement stability, and emit low total power, removing the potential for sample photolysis. The dual beam configuration, combined with the reference measurement, ensures low noise performance, with minimal baseline and span drift.

Features

  • Simultaneous, accurate measurement of both H2S and SO2
  • Output alarms for H2S (LEL) and SO2 (smoldering fire)
  • Common design with Model 900 (air demand) and Model 910 (stack gas)
  • Exceptional baseline stability
  • Improved sample conditioning via ASR Probe

Industrial

  • Oil & Gas
  • Chemical & Petrochemical
  • Power Plant

Description

Specifications

Methodology Multiple wavelength, high resolution, nondispersive UV
Typical Range 0 to 4% H2S, 0 to 2% SO2 (other ranges available on request)
Accuracy Better than 1% full scale
Repeatability Better than 0.5% full Scale
Linearity Better than 1% full scale
Response Time Typically less than 30s to T90 (excl. sample system)
Sample Transport Air aspiration
Typical Sample Flow 3 to 5 L/min (0.1 to 0.2 CFM)
Temperature Control Independent control of four zones (oven, sample line, probe, vent line)
Ambient Temperature 5° to 50°C (41° to 122°F)
Instrument Air Minimum 413.6KPa (60 psig), 120 L/min (4.24 CFM), instrument quality air
Power 120 VAC ±10%, 47-63 Hz or 240 ±10%, 47-63 Hz; 600 W for analyzer only excluding sample and vent line and ASR probe
Analog Outputs 4 to 20 mA self-powered (optional loop-powered), maximum of 4
Communications RS422 with Modbus protocol
RS485 optional
Ethernet optional
Relays 3 independent sets of SPDT relays alarm conditions
Physical Dimensions 155.37 x 111.76 x 30.48 cm (61.17 x 44 x 12 in.)
Weight Estimated minimum 160 kg (350 lbs)
Approvals and Certifications NEC/CEC Class I, Division 2, Groups C & D
ATEX II 2G EEx pd IIB T3
Russian Ex Proof Certification; 1ExpydIIBT3
Russian Gosstandart Pattern Approval
Complies with all relevant European Directives

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