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The D12Ex-IR Infrared Gas Transmitter is a versatile infrared system used primarily for the detection of combustible levels of methane (LEL) or other hydrocarbons. It may also be used for monitoring CO2 levels, either in ppm or percent levels.
D12Ex-IR infrared gas transmitters provide analog signals for remote interface and optional relays for local alarming functions. Two digital communication options, Modbus™ and Hart™, are also available. Certified for use in explosion hazard areas, the unit provides rapid and reliable detection of
hazardous conditions so that protective measures can be activated.
The D12Ex-IR is also available with an infrared sensor designed for CO2 measurements in ambient air or in pumped gas samples. Two carbon dioxide sensors may be specified, one for low range use and another for higher levels of CO2. The low range sensor may be scaled from 0-1000 PPM minimum to 0-5% maximum, while the high range sensor covers ranges from 0-10% minimum to 0-50% maximum.
Infrared detection of methane LEL and other combustible gases is a reliable technique that avoids potential sensor poisoning. In addition, IR sensors are inherently “failsafe”, providing fast detection of a sensor failure. ATI’s Model D12Ex-IR provides this IR detection capability in an explosion-proof package suitable for almost any industrial environment.
The basic sensing element installed in the D12Ex-IR sensor housing is selected based on the measuring application. Four sensors are available as follows:
 |  |
In addition to methane, the D12Ex-IR may be used to monitor for a wide variety of combustible gases and vapors. The unit is factory programmed with response factors (K Factor) to adjust the unit for other combustibles. You simply select the gas from the menu contained in the transmitter. The table below is a list of gases and vapors for which the D12Ex-IR is factory programmed.
| Gas | LEL %VOL | UEL %VOL | Relative Density | K Factor |
| Acetone | 2.50 | 12.80 | 1.2 | 3.280 |
| Chloromethane | 8.10 | 17.40 | 1.7 | 4.970 |
| Cyclopentane | 1.10 | 8.70 | 1.6 | 1.620 |
| Dichloroethane | 5.40 | 11.40 | 1.2 | 8.570 |
| Ethane | 3.00 | 12.40 | 1.05 | 1.010 |
| Ethanol | 3.30 | 19.00 | 1.6 | 1.650 |
| Ethyl acetate | 2.00 | 11.50 | 1.2 | 1.690 |
| Ethylene | 2.70 | 36.00 | 0.98 | 2.837 |
| Ethylene oxide | 3.00 | 100.00 | 1.5 | 0.845 |
| Hexane | 1.20 | 7.50 | 1.3 | 0.872 |
| MEK | 1.40 | 11.40 | 1.1 | 1.870 |
| Methanol | 6.00 | 36.00 | 1.01 | 2.220 |
| n-Butane | 1.60 | 8.40 | 2.11 | 0.970 |
| Pentane | 1.50 | 7.80 | 1.8 | 0.950 |
| Propanol | 2.00 | 12.70 | 1.02 | 1.430 |
| Propylene | 2.00 | 11.10 | 1.5 | 1.690 |
| Toluene | 1.10 | 7.10 | 1.01 | 1.180 |
| Xylene | 1.10 | 7.00 | 1.02 | 1.510 |
The location of an IR sensor depends on the density of the target gas. For methane detection, sensors are often located near the ceiling while detection of heavier gases such as propane or liquified petroleum gas (LPG) require the sensor be mounted lower.
D12Ex-IR systems are available with a remote sensor option for methane applications or with an integral sensor for heavier combustibles. Using a remote sensor option allows the display and control unit to be located where it is convenient for operators. A remote calibration adapter and fixed tubing can be installed so that sensor testing and calibration can be done from floor level.
MODEL D12Ex-IR | – | A | – | B |
1 – Integral sensor holder, no relays
2 – Integral sensor holder, with relays
3 – Remote sensor holder, no relays
4 – Remote sensor holder, with relays
1 – None
2 – MODBUS™ interface
3 – HART™ interface
00-1905 HC Combustible Gas
00-1906 HHC High Hydrocarbon
00-1904 CO2-L, Low Carbon Dioxide
00-1903 CO2-H High Carbon Dioxide
60-0068 Splash guard / Remote calibration adapter
60-0069 Sensor Flow Cell/Calibration Adapter
In addition to methane, the D12Ex-IR may be used to monitor for a wide variety of combustible gases and vapors. The unit is factory programmed with response factors (K Factor) to adjust the unit for other combustibles. You simply select the gas from the menu contained in the transmitter. The table below is a list of gases and vapors for which the D12Ex-IR is factory programmed.
| Gas | LEL %VOL | UEL %VOL | Relative Density | K Factor |
| Acetone | 2.50 | 12.80 | 1.2 | 3.280 |
| Chloromethane | 8.10 | 17.40 | 1.7 | 4.970 |
| Cyclopentane | 1.10 | 8.70 | 1.6 | 1.620 |
| Dichloroethane | 5.40 | 11.40 | 1.2 | 8.570 |
| Ethane | 3.00 | 12.40 | 1.05 | 1.010 |
| Ethanol | 3.30 | 19.00 | 1.6 | 1.650 |
| Ethyl acetate | 2.00 | 11.50 | 1.2 | 1.690 |
| Ethylene | 2.70 | 36.00 | 0.98 | 2.837 |
| Ethylene oxide | 3.00 | 100.00 | 1.5 | 0.845 |
| Hexane | 1.20 | 7.50 | 1.3 | 0.872 |
| MEK | 1.40 | 11.40 | 1.1 | 1.870 |
| Methanol | 6.00 | 36.00 | 1.01 | 2.220 |
| n-Butane | 1.60 | 8.40 | 2.11 | 0.970 |
| Pentane | 1.50 | 7.80 | 1.8 | 0.950 |
| Propanol | 2.00 | 12.70 | 1.02 | 1.430 |
| Propylene | 2.00 | 11.10 | 1.5 | 1.690 |
| Toluene | 1.10 | 7.10 | 1.01 | 1.180 |
| Xylene | 1.10 | 7.00 | 1.02 | 1.510 |
| Gas Type: | Methane: 0-50/100% LEL (also 0-100% V/V CH4) Carbon Dioxide:0-1000 PPPM/5% or 0-10/50% High Hydrocarbons: 0-10/100% V/V |
| Sensor Type: | Single path Non-dispersive Infrared (NDIR) |
| Sensor Separation: | Maximum 100’ cable from remote sensor to transmitter |
| Response Time: | T50 = 10 seconds,T90 = 20 seconds |
| Accuracy: | 2% for methane, propane, CO2, and special orders +/-6% range for HC gases using k-factors |
| Repeatability: | ±1% |
| Zero Drift: | Less than 1% full scale per month, non-cumulative |
| Span Drift: | Dependent on environment, typically less than 1% per month |
| Analog Output: | 4-20 mA, 600 ohms maximum at 24 VDC |
| Digital Output: | HART™ (1200 baud modem interface) MODBUS™ (1200-9600 – RS232 or RS485) |
| Power: | 12–30 VDC, 250 mA maximum, 3/4-wire connection |
| Optional Relays: | Three SPST, 5 A @ 230 VAC or 30 VDC resistive |
| Relay Coil: | Programmable either normally energized or normally de-energized. |
| Certifications: | Class 1, Div. 1, Groups B, C, & D,T6 Class 1, Zone 1,AEx d IIB T6 IEC Ex db IIC T6 Gb; ATEX II 2 G Ex db IIC T6 Gb 2014/30/EU – EMC Directive 2014/35/EU – Low Voltage Directive 2014/34/EU – ATEX Directive 2011/65/EU – RoHS Directive |
| Temperature: | -20° to +60° C |
| Humidity: | 0-99% Non-Condensing |
| Weight: | 7.2 Lbs (2.3 Kg.) |
The D12Ex-IR Infrared Gas Transmitter is a versatile infrared system used primarily for the detection of combustible levels of methane (LEL) or other hydrocarbons. It may also be used for monitoring CO2 levels, either in ppm or percent levels.
D12Ex-IR infrared gas transmitters provide analog signals for remote interface and optional relays for local alarming functions. Two digital communication options, Modbus™ and Hart™, are also available. Certified for use in explosion hazard areas, the unit provides rapid and reliable detection of
hazardous conditions so that protective measures can be activated.
The D12Ex-IR is also available with an infrared sensor designed for CO2 measurements in ambient air or in pumped gas samples. Two carbon dioxide sensors may be specified, one for low range use and another for higher levels of CO2. The low range sensor may be scaled from 0-1000 PPM minimum to 0-5% maximum, while the high range sensor covers ranges from 0-10% minimum to 0-50% maximum.
Infrared detection of methane LEL and other combustible gases is a reliable technique that avoids potential sensor poisoning. In addition, IR sensors are inherently “failsafe”, providing fast detection of a sensor failure. ATI’s Model D12Ex-IR provides this IR detection capability in an explosion-proof package suitable for almost any industrial environment.
The basic sensing element installed in the D12Ex-IR sensor housing is selected based on the measuring application. Four sensors are available as follows:
| |
In addition to methane, the D12Ex-IR may be used to monitor for a wide variety of combustible gases and vapors. The unit is factory programmed with response factors (K Factor) to adjust the unit for other combustibles. You simply select the gas from the menu contained in the transmitter. The table below is a list of gases and vapors for which the D12Ex-IR is factory programmed.
| Gas | LEL %VOL | UEL %VOL | Relative Density | K Factor |
| Acetone | 2.50 | 12.80 | 1.2 | 3.280 |
| Chloromethane | 8.10 | 17.40 | 1.7 | 4.970 |
| Cyclopentane | 1.10 | 8.70 | 1.6 | 1.620 |
| Dichloroethane | 5.40 | 11.40 | 1.2 | 8.570 |
| Ethane | 3.00 | 12.40 | 1.05 | 1.010 |
| Ethanol | 3.30 | 19.00 | 1.6 | 1.650 |
| Ethyl acetate | 2.00 | 11.50 | 1.2 | 1.690 |
| Ethylene | 2.70 | 36.00 | 0.98 | 2.837 |
| Ethylene oxide | 3.00 | 100.00 | 1.5 | 0.845 |
| Hexane | 1.20 | 7.50 | 1.3 | 0.872 |
| MEK | 1.40 | 11.40 | 1.1 | 1.870 |
| Methanol | 6.00 | 36.00 | 1.01 | 2.220 |
| n-Butane | 1.60 | 8.40 | 2.11 | 0.970 |
| Pentane | 1.50 | 7.80 | 1.8 | 0.950 |
| Propanol | 2.00 | 12.70 | 1.02 | 1.430 |
| Propylene | 2.00 | 11.10 | 1.5 | 1.690 |
| Toluene | 1.10 | 7.10 | 1.01 | 1.180 |
| Xylene | 1.10 | 7.00 | 1.02 | 1.510 |
The location of an IR sensor depends on the density of the target gas. For methane detection, sensors are often located near the ceiling while detection of heavier gases such as propane or liquified petroleum gas (LPG) require the sensor be mounted lower.
D12Ex-IR systems are available with a remote sensor option for methane applications or with an integral sensor for heavier combustibles. Using a remote sensor option allows the display and control unit to be located where it is convenient for operators. A remote calibration adapter and fixed tubing can be installed so that sensor testing and calibration can be done from floor level.
MODEL D12Ex-IR | – | A | – | B |
1 – Integral sensor holder, no relays
2 – Integral sensor holder, with relays
3 – Remote sensor holder, no relays
4 – Remote sensor holder, with relays
1 – None
2 – MODBUS™ interface
3 – HART™ interface
00-1905 HC Combustible Gas
00-1906 HHC High Hydrocarbon
00-1904 CO2-L, Low Carbon Dioxide
00-1903 CO2-H High Carbon Dioxide
60-0068 Splash guard / Remote calibration adapter
60-0069 Sensor Flow Cell/Calibration Adapter
In addition to methane, the D12Ex-IR may be used to monitor for a wide variety of combustible gases and vapors. The unit is factory programmed with response factors (K Factor) to adjust the unit for other combustibles. You simply select the gas from the menu contained in the transmitter. The table below is a list of gases and vapors for which the D12Ex-IR is factory programmed.
| Gas | LEL %VOL | UEL %VOL | Relative Density | K Factor |
| Acetone | 2.50 | 12.80 | 1.2 | 3.280 |
| Chloromethane | 8.10 | 17.40 | 1.7 | 4.970 |
| Cyclopentane | 1.10 | 8.70 | 1.6 | 1.620 |
| Dichloroethane | 5.40 | 11.40 | 1.2 | 8.570 |
| Ethane | 3.00 | 12.40 | 1.05 | 1.010 |
| Ethanol | 3.30 | 19.00 | 1.6 | 1.650 |
| Ethyl acetate | 2.00 | 11.50 | 1.2 | 1.690 |
| Ethylene | 2.70 | 36.00 | 0.98 | 2.837 |
| Ethylene oxide | 3.00 | 100.00 | 1.5 | 0.845 |
| Hexane | 1.20 | 7.50 | 1.3 | 0.872 |
| MEK | 1.40 | 11.40 | 1.1 | 1.870 |
| Methanol | 6.00 | 36.00 | 1.01 | 2.220 |
| n-Butane | 1.60 | 8.40 | 2.11 | 0.970 |
| Pentane | 1.50 | 7.80 | 1.8 | 0.950 |
| Propanol | 2.00 | 12.70 | 1.02 | 1.430 |
| Propylene | 2.00 | 11.10 | 1.5 | 1.690 |
| Toluene | 1.10 | 7.10 | 1.01 | 1.180 |
| Xylene | 1.10 | 7.00 | 1.02 | 1.510 |
| Gas Type: | Methane: 0-50/100% LEL (also 0-100% V/V CH4) Carbon Dioxide:0-1000 PPPM/5% or 0-10/50% High Hydrocarbons: 0-10/100% V/V |
| Sensor Type: | Single path Non-dispersive Infrared (NDIR) |
| Sensor Separation: | Maximum 100’ cable from remote sensor to transmitter |
| Response Time: | T50 = 10 seconds,T90 = 20 seconds |
| Accuracy: | 2% for methane, propane, CO2, and special orders +/-6% range for HC gases using k-factors |
| Repeatability: | ±1% |
| Zero Drift: | Less than 1% full scale per month, non-cumulative |
| Span Drift: | Dependent on environment, typically less than 1% per month |
| Analog Output: | 4-20 mA, 600 ohms maximum at 24 VDC |
| Digital Output: | HART™ (1200 baud modem interface) MODBUS™ (1200-9600 – RS232 or RS485) |
| Power: | 12–30 VDC, 250 mA maximum, 3/4-wire connection |
| Optional Relays: | Three SPST, 5 A @ 230 VAC or 30 VDC resistive |
| Relay Coil: | Programmable either normally energized or normally de-energized. |
| Certifications: | Class 1, Div. 1, Groups B, C, & D,T6 Class 1, Zone 1,AEx d IIB T6 IEC Ex db IIC T6 Gb; ATEX II 2 G Ex db IIC T6 Gb 2014/30/EU – EMC Directive 2014/35/EU – Low Voltage Directive 2014/34/EU – ATEX Directive 2011/65/EU – RoHS Directive |
| Temperature: | -20° to +60° C |
| Humidity: | 0-99% Non-Condensing |
| Weight: | 7.2 Lbs (2.3 Kg.) |
WJF Instrumentation Ltd.
#5 3610 – 29th Street N.E.
Calgary, Alberta
Canada
T1Y 5Z7
Calgary Head Office
Toll-Free: (877)291-5572
Standard: (403)291-5570
Ontario & Maritimes Sales:
(905)809-6918
