Envent Engineering Ltd. Page 6 Revision 2.4
Analyzer Specifications
Measurement
Method
ASTM D4084 - 07: Standard Test Method for Analysis of Hydrogen
Sulfide in Gaseous Fuels (Lead Acetate Reaction Rate Method)
Ambient
Temperature
0-50 °C (standard) consult factory for other requirements, 0 to 90%
humidity (non-condensing)
Power 12-24 VDC @ less than 3W
Or, 100-240 VAC 50/60 Hz, 5W,
(300W when total sulfur option is included)
Fuse Rating: 5 Amps, 250V, Slow blow, Size: 0.201'' Dia x 0.787'',
Package/Case: 5 mm x 20 mm
Battery (for 1d Controller Board only): Lithium 3.6V, Dia 0.571'' & 0.992''
Long
Electrical
Certification
330S-
DS
Class I, Division 1 Groups B C D or CD T3C Tamb 0 °C to +
50 °C
331S-
DS
Class I, Division 2 Groups B C D or CD T3C Tamb 0 °C to +
50 °C
For more information on Hazardous location certification, refer to the
Envent’s Website.
Output Ranges Standard ranges are between 10-100 ppb and 0-100 ppm
Response Time 20 seconds to 90% of step change
Accuracy ±1.5% of full range on channel 1 (for SDS Models, channel 2 has an
accuracy of ± 2.0%).
For dilution (option): ±2.5%
For Total Sulfur (Option): ±2.0%
For PPB (Option): Based on "base noise average"
Display Graphic Liquid Crystal Display; menu is scrolled by internal button or
magnetic wand (330S)
Outputs Two 4-20mA outputs (loop power required), optional 4-20mA powered
output boards are available
Serial Communication:
(1) RS-232 Modbus protocol
(3) RS-485 Modbus protocol (One RS-485 for remote display option)
Ethernet port as an optional feature
4 SPDT relays (120 VAC 5A maximum)
4 solid state solenoid drivers
Total Sulfur Utilized when all sulfur compounds need to be measured. A Total sulfur
reaction furnace is added which allows the analyzer to measure total
sulfur
Dilution Sample
System
Utilized when the analyzer needs to measure ranges above 100 ppm. A
permeable membrane dilution system
Liquid Sampling Utilized when a liquid sample conditioning system is required to
measure hydrogen sulfide in Liquids
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