Sierra Monitor Corporation Catalytic Bead 5100-02-IT - Manual

Sentry IT Gas Sensor Module
IT Combustible – Catalytic Bead
Sierra Monitor Corporation 1991 Tarob Ct. Milpitas, CA 95035 (408) 262-6611 (800) 727-4377 Fax: (408) 262-9042
Web site: www.sierramonitor.com E-Mail: [email protected]
Proven Performance - FM Approved
Cost effective - 180 day Calibration
frequency, maintenance cut in half!
The 5100-02-IT Combustible Gas Sensor Module is
a key member of the powerful Sierra Monitor IT
Series family of gas sensor modules. The 5100-02-
IT provides the features needed by safety and
instrumentation engineers including:
• 180 day calibration interval
• FM Approval for performance and safety
• SIL-2 certified
• Modbus RTU RS-485 interface
• 4-20 mA output
• HART Interface
• SMC Sentry digital bus interface
• Optional Integral and Trouble alarm relays
– Alarm, Warning
• Aluminum or 316 Stainless Steel enclosure
• Non-intrusive calibration
• Integral scrolling LED display
• Optional remote sensor
• Remote alarm reset capable
Model 5100-02-IT utilizes the proven, reliable,
catalytic bead technology to monitor for combustible
gases (methane and others). Output range is 0-
100% of Lower Explosive Limit (LEL). This detector
has minimal maintenance requirements and is
Factory Mutual approved for six month calibration
intervals. Internal, continuous self-diagnostics
automatically detect and alarm any fault problems.
The 5100-02-IT can be used as a 4-20 mA
component or as a Modbus RTU node. For higher
level system capability the module can interface
directly to Sierra Monitor’s Sentry Controller
enabling system level Modbus serial
communications, area and zone alarm
management, extensive system diagnostic features,
WebServer interface, and multiplexing sensor
connections.
Factory Mutual (FM) Approval for performance,
electrical safety and environmental parameters
including Class I, Div. 1, Groups B, C, D and Class
I, Zone 1, Group IIC, IP66. With a NEMA-4X
enclosure standard, approved multiplexing, and
approved six month calibration interval, cost of
ownership is minimized at the acquisition,
installation and operating stages
How It Works
Catalytic Bead gas sensors detect gas by
comparing the resistance of two heated elements.
One element is catalytic to enhance the burning of
combustible gases, the other element is passive.
Electronic circuits are used to compare the change
in the catalytic bead resistance relative to the
passive bead. The relative change is calibrated to
determine the concentration of the gas of interest.
Features Benefits
 Six-month calibration interval Longest rated and FM-approved calibration cycle for
any catalytic-bead gas detector - reduced maintenance
 Non-intrusive calibration Able to calibrate module without declassifying the area
 Network-compatible with Modbus, 4-20 mA,
Sentry bus, HART and relay interface Easily meets users needs for access to critical plant
safety information
 FM Approved for Performance and Hazardous
Areas Proven and approved for installation in areas where
combustible gases are located
 SIL-2 Certified Meets long term reliability design standards
 Local scrolling display Ease of calibration and easy access to gas
concentration, relay status and diagnostics