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Rosemount-928 Wireless Gas Monitor

Rosemount™ 928 Wireless Gas Monitor

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Product Description

Get continuous monitoring and reliable alerts for combustible or toxic gas leaks—without wiring, conduit, or complex installation work. The Rosemount™ 928 Wireless Gas Detector, powered by proven WirelessHART® technology, reduces total installed cost and deployment time while extending gas detection to remote, hard-to-reach, or hazardous areas. Say goodbye to broken wires and ongoing maintenance with a hot-swappable, tool-free sensor module that enables in-field replacement in minutes—keeping your people protected and your operations running without interruption.

Specifications

Operating Temperature
O2 Sensor Depletion: -22 °F to +122 0°F (-30 °C to +50 °C)
CO Sensor: -22 °F to +122 °F (-30 °C to +50 °C)
Combustible Gas Sensors: -40 to +140°F (-40°C to +60 °C)
Update Rate
1 second to 60 minutes, user selectable
Time Constant / Response
H2S Sensor:
  • T20 < 8 seconds
  • T50 < 10 seconds
  • T90 < 45 seconds
O2 Sensor:
  • T90 < 15 seconds
Combustible Sensor:
  • T90 < 25 seconds
Detection Range
H2S: Gas Concentration Level 0-100 ppm range
O2 Depletion: Gas Concentration Level 0-25 % by volume
CO: Gas Concentration Level 0-1,000 ppm range
Combustible Sensor: 0-100% LEL
Power Supply
Replaceable, intrinsically safe lithium-thionyl chloride power module with PBT polymer enclosure
Antenna Type
PBT/PC integrated omnidirectional antenna
Humidity Range
H2: 10-95 % Relative Humidity Non Condensing
O2: 10-95 % Relative Humidity Non Condensing
CO: 5-95 % Relative Humidity Non Condensing
Combustible Sensor: 0-95%, non-condensing
Enclosure Rating
IP66 ingress protection (IP) filter
Housing Material
Low-copper aluminum (A360) or stainless steel
Certifications/Approvals
Intrinsically Safe, CSA Division 1, and ATEX/IECEx Zone 0
Outputs
IEC 62591 WirelessHART 2.4GHz DSSS. Optional discrete output to support local alarms
Accuracy
H2S: ± 3 ppm or 10 % of reading, whichever is greater
O2 Depletion: ±Within 0.5 % of oxygen content of supply gas
CO: ± 6 ppm or 10 % of reading, whichever is greater
Combustible Sensor: ±3% LEL (Methane), ±5% LEL (Hydrogen)

Features

  • Hot-swappable electrochemical sensor module with end-of-life diagnostics can be installed in the field without tools
  • Replaceable, intrinsically safe lithium-thionyl chloride power module has over two years of service life and can be easily exchanged in hazardous field locations
  • WirelessHART technology is secure, cost-effective and delivers >99% data reliability
  • Easy, intuitive installation enables a quick method to add gas leak safety monitoring without the cost of wiring
  • High performance gas leak monitoring comparable to conventional wired gas leak monitors with an accuracy of ±3 ppm or 10% of reading, whichever is greater
  • Now Measures Combustible Gas
    • Detects hydrocarbons and hydrogen
    • True LEL automatically adjusts calibration to the gas type detected for best accuracy
    • Driftless measurement eliminates annual calibrations
    • >10 year sensor life

Documents & Drawings