Bently Nevada 3500/33 RELAY MODULE 149992-01 kilocalorie

Description

The Hazardous Gas Detection System uses the approved 350800
hazardous gas sensor. This sensor consists of a catalytic bead and a
reference bead that form a Wheatstone bridge when connected to the
3500/63 Hazardous Gas Detection Module, as shown in Figure 2-4. The
catalytic bead of the sensor (labeled Rreac in Figure 2-4) is impregnated
with a catalyst that promotes oxidization, while the reference bead is
treated to inhibit oxidization. Electrical current from the monitor heats the
beads to a temperature at which gas will oxidize at the catalytic bead. This
oxidation, when gas is present, raises the temperature of the catalytic
bead above the temperature of the reference bead, which increases its
resistance and unbalances the bridge. The imbalance is proportional to
the concentration of combustible gas.

Hazardous gas detection systems must conform to specific standards.
These standards relate not only to general safety and hazardous areas
that other Bently Nevada monitoring systems meet, but also to strict
performance requirements that are unique to hazardous gas detection
systems. This section presents some of those unique performance
requirements as well as hazardous area information.
3.1 Performance Certification
Hazardous gas detection systems are performance certified as a group;
which consists of a sensor (detector head), a monitor, and a means of
alarm indication. The certified system consists of all of the following:
• 3500/05 instrument rack, and
• 1 or 2 3500/15 power supply(ies), and
• 3500/22 TDI (Transient Data Interface) or 3500/20 RIM (Rack Interface
Module), and
• 3500/63 hazardous gas detection monitor, and
• 350800 hazardous gas sensor(s) with or without Ex d flameproof
junction box or another sensor approved by Bently Nevada, LLC *, and
• 3500/01 Configuration Software

• a 3500/32, 3500/33, or 3500/34 Relay Module
• an approved control system** receiving data from the 3500 system
via:
– 4-20 mA outputs from the rack, or
– Modbus® through the 3500/92 Communications Gateway
Module.
Additional acceptable accessories are:
• 3500/02 Data Acquisition Software
• 3500/03 Operator Display Software
• 3500/94 Display
• 3500/95 Display w/ Integrated Computer

Details: If you need urgent delivery orders, please feel free to contact us, and we will try our best to meet your needs.
Price problem: If you find that other suppliers offer cheaper prices for the same product, we are also willing to provide you with reference prices and give you further discounts.
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Contact Person: Chen

135785-01 3500/93 Display Unit, non backlighted
135785-02 3500/93 Display Unit, back-lighted
137412-01 3500/93 Manual
135799-01 3500/93 Display Interface Module
135799-02 3500/93 Display Interface Module
(use with A05 option only)
135813-01 3500/93 Display Interface I/O
Module
136634-0010-01 10 Foot (3 metres) Cable (PVC)
136634-0050-01 50 Foot (15 metres) Cable (PVC)
136634-0050-02 50 Foot (15 metres) Cable
(Teflon? )
136634-0100-01 100 Foot (30 metres) Cable (PVC)
136634-0100-02 100 Foot (30 metres) Cable
(Teflon? )
130121-02-01 500 Foot (152 metres) Extension
Cable (PVC)
130121-02-02 500 Foot (152 metres) Extension
Cable (Teflon? )
02200271 External Power Supply for 115 Vac
02200272 External Power Supply for 230 Vac
138227-01 Cable Adapter
146085-01 Power Cable
137224-01 System Mounting Assembly
(sheet metal for A01 & A05
options)
04309007 4-40 X 0.63 Phillips head screw for
System Mounting Assembly, 4 are
required