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Rosemount™ 928 Wireless Gas Monitor
The Rosemount 928 Wireless Gas Monitor detects hydrogen sulfide (H2S), carbon monoxide (CO), and oxygen depletion (O2) in remote applications previously too challenging and costly to monitor.
This wireless toxic gas monitoring system enhances worker safety through early gas leak detection, simply integrates with WirelessHART® technology, and eliminates the need for expensive wiring. The Rosemount 928 Wireless Gas Monitor easily connects to the Rosemount 628 Universal Gas Sensor which consists of a tool-less-hot-swappable smart sensor module.

Rosemount™ 928 Wireless Gas Monitor

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Rosemount™ 928 Wireless Gas Monitor

Specs

Operating Temperature
H2S: -40 °F to +122 °F (-40 °C to +50 °C)
O2 Depletion: -22 °F to +122 °F (-30 °C to +50 °C)
CO: -22 °F to +122 °F (-30 °C to +50 °C)
Update Rate
1 second to 60 minutes, user selectable
Time Constant / Response
H2S:
  • T20 < 8 seconds
  • T50 < 10 seconds
  • T90 < 45 seconds
O2:
  • T90 < 15 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
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
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

Features

  • Hot-swappable electrochemical sensor module with end-of-life diagnostics that can be installed in the field without tools.
  • Replaceable, intrinsically safe lithium-thionyl chloride power module. The power module has over two years of service life and can be easily exchanged in the field in hazardous locations.
  • WirelessHART technology is secure, cost-effective and delivers >99% data reliability
  • Easy, intuitive installation enables a quick method to add safety monitoring without the cost of wiring
  • High performance monitoring comparable to conventional wired gas monitors with an accuracy of ±3 ppm or 10% of reading, whichever is greater

Education

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