Sierra Monitor Corporation Catalytic Bead 5100-02-IT, Catalytic Bead IT Series, Sentry IT 5100-02-IT Specification Sheet

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 8 AMP 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.

Sentry IT Gas Sensor Module

IT Combustible - Catalytic Bead

180 Day Calibration Interval

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

♦ Six-month calibration interval

♦ Non-intrusive calibration
♦ Network-compatible with Modbus, 4-20 mA,

Sentry bus, HART and relay interface

♦ FM Approved for Performance and Hazardous

Areas

♦ SIL-2 Certified
♦ Local scrolling display

Sierra Monitor Corporation 1991 Tarob Ct. Milpitas, CA 95035 USA [phone] [phone] Fax: [phone]

Visit our website: www.sierramonitor.com E-mail: [e-mail]

Benefits

Longest rated and FM-approved calibration cycle for
any catalytic-bead gas detector - reduced mainte­nance

Able to calibrate module without declassifying the area
Easily meets users needs for access to critical plant

safety information
Proven and approved for installation in areas where

combustible gases are located
Meets long term reliability design standards
Ease of calibration and easy access to gas concentra-

tion, relay and alarm status and diagnostics

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Specifications:

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Ordering Information

Relay/ Remote

Model Enclosure Connection Protection Option

5100-02-IT -XX -XX -XX -X -X

- A1 = AL 3/4” NPT - 01 = No Relays (std.) - 00 = Std. - 0 = Std. - 0 = None

- A2 = AL M20 x 1.5 - 02 = Relays Option - 1 = Remote

- S1 = SS 3/4” NPT - 05 = HART Option Sensor

- S2 = SS M20 x 1.5

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Sierra Monitor Corporation 1991 Tarob Ct. Milpitas, CA 95035 USA [phone] [phone] Fax: [phone]

Visit our website: www.sierramonitor.com E-mail: [e-mail]

Remote Sensor Option

It is often necessary to sample the combustible gas at
some distance from the gas sensor module. The IT Series
enables the user to mount the sensor remotely from the
transmitter without the need for expensive and high-main­tenance sample pumps. The Remote Sensor Option pro­vides a separate gas sensor that can be mounted up to 50
feet from the transmitter and connected via a cable in­cluded.

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Rev. 10/11