iTrans?0 pages

Fixed Gas Detector

The iTrans fixed-point gas monitor employs an
intelligent electronics platform to provide one or two
points of detection from a single head for maximum
flexibility, superior performance and lower installation
costs.
Able to monitor any combination of gases for a
specific environment, iTrans utilizes our industryproven “smart” sensor technology and safety features
including automatic sensor recognition, access
code security, and zero and cal fault protection – all
enclosed within an explosion-proof aluminum or
stainless steel housing.
The microprocessor-controlled transmitters are
capable of independent operation or multi-point system
configuration. With optional on-board relays, the
monitor has the added ability of stand-alone operation,
activating alarms, horns, or fans and can also shut
down a system without the need to wire back to a
central control panel.

Specifications
Enclosures:
Cast aluminum, poly-bonded coating or 316 stainless steel. Both are
explosion-proof, NEMA 7X, IP66 rated

Display:
Dual-channel split-screen LED display (4 digit, 7-segment arrangement per
channel) provides simultaneous display of one or two gases.

Sensors:
Combustible Gases: Catalytic bead and/or Non-Dispersive Infrared (NDIR)
Oxygen / Toxic Gases: Electrochemical diffusion

Signal Output:
4-20 mA, linear (analog) and ModBus RTU (digital)
RS485 digital communication with ModBus RTU software protocol system
at 9600 baud. Three or four wire system capable of accommodating over
200 devices in bus configuration. Address selection through on-board
8-position dipswitch.

Measuring Ranges:
Combustible gases: 0-100% LEL in 1% increments
Oxygen: 0-30% by volume in 0.1% increments
Ammonia: 0-200 ppm in 1 ppm increments
Carbon Monoxide: 0-999 ppm in 1 ppm increments
Hydrogen Sulfide: 0-500 ppm in 1 ppm increments
Sulfur Dioxide: 0.2-99.9 ppm in 0.1 ppm increments
Hydrogen Cyanide: 0.2-30 ppm in 0.1 ppm increments
Hydrogen Chloride: 0.2-30 ppm in 0.1 ppm increments
Phosphine: 0-1 ppm in 0.01 ppm increments
Nitrogen Dioxide: 0.2-99.9 ppm in 0.1 ppm increments
Nitric Oxide: 0-999 ppm in 1 ppm increments
Chlorine: 0.2-99.9 ppm in 0.1 ppm increments
Chlorine Dioxide: 0.02-1 ppm in 0.01 ppm increments
Hydrogen: 0-999 ppm in 1 ppm increments
Input Current (Max)
Toxic Gas / Oxygen: 150 mA at 24 VDC (single gas)
Combustible gases (Catalytic): 175 mA at 24 VDC, 0.6 A peak (single gas)
Combustible gases (Infrared): 150 mA at 24 VDC, 0.6 A peak (single gas)
Combined catalytic/infrared: 280 mA at 24 VDC (two gas)
Input Voltage:
12-28 VDC operating range (24 VDC typical)

The Fixed Gas Detection People
www.oldhamgas.com

Alarm Relays
3 alarm relays: Two user-programmable relays, SPST, N.O.; plus one fault
relay, SPST, N.C.
Contact Capacity:
5 Amps at 30 VDC
Temperature Range:
-4°F to +122°F (-20°C to +50°C), typical
Humidity Range:
15-90% RH (non-condensing), typical
Approvals: (Sensor-specific)
Consult factory for current approval status
NRTL/c and CSA – Class I, Div. 1, 2, t
t
Groups B, C, D; AEx d IIB + H2
ATEX – Ex d IIB + H2 T5 (sensor-specific)
IEC – Ex d IIB + H2 T5 (sensor-specific)
China – GB 3836. 1-Ex d IIC T4; LEL version
GB15322-94 Fire protection

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