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IR15TT Datasheet Preview

IR15TT Datasheet

Infrared Dual Gas Sensor

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SGX Europe Sp. z o.o.
Building 11
Ligocka St. 103,
40-568 Katowice,
Poland
T: +48 (0) 32 438 4778
E: sales.is@sgxsensortech.com
www.sgxsensortech.com
IR15 Dual Gas Series Datasheet
Infrared Dual Gas Sensor for Hazardous Environments
(Portable and Fixed Systems)
The SGX infrared sensors use the proven Non-Dispersive
Infrared (NDIR) principle to detect and monitor the presence
of gases. With an infrared source and specific filtering on the
pyroelectric detectors mounted inside the optical/gas cavity,
individual gases or types of gas can be identified and their
concentrations determined.
These sensors are suitable for reliable monitoring of gas
levels in general safety applications where the sensor size is
restricted and require a flameproof enclosure for hazardous
environments.
The IR15 Series contain two active detector elements for
simultaneous monitoring of Carbon Dioxide and Methane or
Hydrocarbon mixtures in the same size housing as some of
the single gas sensors from the IR1xxx series sensors,
making the sensor more cost effective than two separate
sensors.
APPLICATIONS
Oil & Gas
Petrochemical
Biogas
Wastewater
Utilities
Steelworks
Confined Space Entry
Indoor Air Quality
FEATURES
For detection of the following gases:
o Carbon Dioxide & Hydrocarbons,
o Hydrocarbons Mixtures
Gas concentration ranges:
o 0 - 5% Carbon Dioxide
(also suitable for 0 to 0.5%v/v)
o 0 - 100% Carbon Dioxide
(also suitable for 0 to 10%)
o 0 - 100%v/v Hydrocarbons
(also suitable for 0 to 100%LEL)
19mm sensor height
Embedded thermistor for improved temperature
compensation
Diffused gas sampling via mesh
Low power
Reference channel for self-compensation
Special gold plated optical gas cavity for stable signal
levels
Operational in varying temperature, pressure and
humidity
Fast response
Rugged stainless steel construction
No moving parts
Immunity from ‘poisoning’
Reliable fail-safe operation
Certified: ATEX, IECEx, CSA and UL
OPERATION
To operate, the sensors must be interfaced to a suitable
circuit for power supply, output amplification and signal
processing. Sensor outputs require linearisation and
compensation for ambient temperature variation using
algorithms in the system firmware. This is necessary for
sensors to meet their full performance specification. An
embedded temperature sensor facilitates this compensation
on certain types. Further compensation for pressure changes
can also be made in an algorithm, provided there is a
suitable input from a pressure sensor.
A set of Application Notes is available from the SGX
Sensortech Ltd website, to explain more about NDIR gas
sensing and provide advice for the end-user on interfacing
the sensors and processing signals.
TECHNICAL SPECIFICATION
Mechanical
Dimensions
Body material
Approximate Weight
See Outlines
Stainless Steel
35g
Environmental
Ambient temperature range
for operation:
storage:
Operational pressure range
Humidity range for operation
and storage
-20°C to +55°C
-20°C to +55°C
30kPa to 130kPa
0 to 95% RH
(Non-condensing)
Electrical
DC supply to detectors
Typical power
IR Source Supply
(Recommended)
3V to 5V
180mW @ 5V
+5V, 60mA
(Square Wave at 4Hz, 50% duty cycle)
___________________________________________________________________________________________
Whilst SGX has taken care to ensure the accuracy of the information contained herein it accepts no responsibility for the con sequences of any use thereof and also
reserves the right to change the specification of goods without notice. SGX accepts no liability beyond the set out in its standard conditions of sale in respect of
infringement of third party patents arising from the use of SGX products in accordance with information contained herein.
In case of modification of the product, SGX disclaims all liability.
SGX Europe sp .z o.o. Poland REGON: 362332227
DS-0249, Issue 1, 13-Oct-2016, Page 1




SGX

IR15TT Datasheet Preview

IR15TT Datasheet

Infrared Dual Gas Sensor

No Preview Available !

SGX Europe Sp. Z o.o.
Building 11
Ligocka St. 103,
40-568 Katowice,
Poland
T: +48 (0) 32 438 4778
E: sales.is@sgxsensortech.com
www.sgxsensortech.com
CONFIGURATIONS
Sensor
Type
Gas
Target Gas 1
Concentration Range *
Highest
Lowest
IR15TT
IR15TT-M Carbon Dioxide
0 to 5%
0 to 0.5%
IR15TT-R
0 to 100% 0 to 10%
Target Gas 2
Gas
Hydrocarbons
Concentration Range *
Application(s)
Highest
Lowest
0 to 100%
0 to 100%LEL
Oil & Gas
Petrochemical
Wastewater
Steelworks
Confined Space Entry
Indoor Air Quality
Biogas
IR15TT-D Hydrocarbons 0 to 100% 0 to 100%LEL
Utilities
* The Highest Concentration Range is the highest range the sensor is suitable. The Lowest Concentration Range is the lowest range the sensor is
suitable. The use of the sensor beyond these ranges will affect the sensor’s performance.
IR15TT
The IR15TT can be used in all applications for general monitoring of both relatively low concentrations of carbon dioxide and
simultaneous %LEL and %v/v concentrations of Group II hydrocarbons, including benzene. The sensors contain a broadband
hydrocarbon detector which are cross sensitive to most hydrocarbons and can therefore be calibrated to a specific target gas or
a number of gases that can then be selected in the configuration of the customer’s gas measurement instrument.
IR15TT-M
The IR15TT-M is very similar to the IR15TT except that a narrowband hydrocarbon detector is used. The sensor can still be
used to monitor the same levels of carbon dioxide and hydrocarbons but are unsuitable for the detection of benzene. The
narrowband detector also has a slightly lower response to humidity than the IR15TT, but is generally more cross-sensitive to
other hydrocarbons.
IR15TT-R
The IR15TT-R was designed specifically for Biogas applications for the simultaneous detection of carbon dioxide up to 100%v/v
and %LEL and %v/v concentrations of hydrocarbons, but can be potentially used for other applications. The IR15TT-R contains
the narrowband detector which is unsuitable for the detection of benzene.
IR15TT-D
The IR15TT-D is fitted with both the narrowband and broadband hydrocarbon detectors with differing centre wavelength and
bandwidth to potentially differentiate between hydrocarbons. The sensor was designed for the gas instruments being used by
utilities companies to help differentiate between different compositions of natural gas.
HANDLING PRECAUTIONS
1. Do not allow sensors to fall on the floor. This could cause IR Source filament breakage, damage to the pins and the gas
entrance aperture.
2. Do not apply mechanical force against the gas entrance aperture.
3. Do not immerse sensors in water or other fluids.
4. Protect the gas entrance aperture against dust ingress and sprayed materials.
5. Anti-static handling precautions must be taken.
© SGX Sensortech 2016
Document subject to disclaimer on page 1
DS-0249, Issue 1, 13-Oct-2016, Page 2


Part Number IR15TT
Description Infrared Dual Gas Sensor
Maker SGX
Total Page 7 Pages
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