Electrochemical Sensor
Loop-Powered (2-Wired), 4-20 mA output
3 Character, 7 segment display screen with backlight
3 Push-button interface (ADD, MENU, SUB) with corresponding magnetic, non-intrusive switches
Operating temperature range -40° C to +55°C
Aluminum device enclosure
303 Stainless-steel sensor housing
1-Year warranty
The T2A Series Toxic Gas Detector is a versatile assembly that uses an electrochemical sensor to detect a variety of gases. 2-Wire Loop-Powered to withstand extreme climatic conditions and harsh environments. Magnetic switches allow for non-intrusive calibration while in the field.
The T2A represents the latest leading edge technology in fixed gas detection today.
| Combustibles | LEL H2 Specific | O2 Oxygen | H2S Hydrogen Sulfide | CO Carbon Monoxide | CH4 Methane | HC Hydrocarbons | CO2 Carbon Dioxide | |||||
| LEL | PPM | |||||||||||
| Part # | UL | 65-2640RK | 65-2647RK | 65-2641RK | 65-2643RK-05 | 65-2645RK-05 | 65-2646RK-05 | 65-2649RK-CH4 65-2658RK-CH4 | 65-2649RK-HC | 65-2660RK-02 65-2660RK-03 65-2660RK-05 65-2660RK-10 | ||
| CSA | 65-2640RK-05 | 65-2647RK-05 | 65-2641RK-05 | |||||||||
| Sensors | Catalytic | Galvanic cell | Electrochemical | Infrared | ||||||||
| Measuring Ranges | 0 – 100% LEL | 0 – 9000 CH4 | 0 – 100% | 0 – 25.0% Vol. | 0 – 100 ppm | 0 – 300 ppm | 0 – 100% LEL 0 – 100% Vol. | 0 – 100% LEL | -02 | 0 – 5000 ppm | ||
| -03 -05 | 0 – 5% Vol. 0 – 50% Vol. | |||||||||||
| -10 | 0 – 100% Vol. | |||||||||||
| Resolution | 1% LEL | 20 ppm | 1% LEL | 0.1% Vol. | 1 ppm | 1% LEL / 1% Vol. | 20 ppm / 0.01% Vol / 0.1% Vol. / 1% Vol. | |||||
| Lower Detectable Limit (LDL) | 2% of full scale | 0.1% Vol. | 2% of full scale | |||||||||
| Max Current Draw (24VDC) | 160 mA with alarm 1 and alarm 2 active and all relays energized | 125 mA with alarm 1 and alarm 2 active and all relays energized | 160 mA with alarm 1 and alarm 2 active and all relays energized | |||||||||
| Response Time (T-90) | 35 Seconds or less | 90 Seconds | 60 Seconds | 90 Seconds | 30 Seconds or less | |||||||
| Life Expectancy | 2 to 3 years with normal service | 3 to 5 years with normal service | 2 to 3 years with normal service | 5 years plus with normal service | ||||||||
| Accuracy (which ever is greater) | ± 5% of reading or ± 2% of full scale | ± 0.5% Vol. O2 | ± 5% of | ± 5% of | ± 5% of reading or ± 2 % of full scale | |||||||
| Weather Resistant | Patented water repellent sensor coating | |||||||||||
| Alarms | ||||||||||||
| Alarm Settings | Two fully programmable alarm set points, increasing / decreasing, latching / self-resetting, on delays, off delays, normally energized or de-energized | |||||||||||
| Alarm Indication | Visual LEDs. Alarm 1, Amber; Alarm 2, Red; Fail, Red | |||||||||||
| Relays | 5 amp form ‘C’ contacts for alarm 1, alarm 2, and fail | |||||||||||
| Physical | ||||||||||||
| Dimensions | Height: 8.5” (215 mm), Width: 5.2” (132 mm), Depth: 4.5” (114 mm) | |||||||||||
| Display | Alphanumeric OLED display. 8 characters per line; 2 lines for gas concentration readout, plus user-friendly calibration and setup | |||||||||||
| Enclosure | Explosion proof for Class I, Div 1, Groups B, C, D. | |||||||||||
| Enclosure Rating | NEMA 4X, explosion proof, watertight, cast aluminum with o-ring seal and epoxy powder coating | |||||||||||
| Controls | Magnet used for calibration functions. Calibrates without opening the housing. Internal push-button controls also available for calibration and setup | |||||||||||
| Operating Environment | ||||||||||||
| Operating Temperature | -40°F to 167°F -40°C to 75°C | -4°F to 113°F -20°C to 45°C | -40°F to 104°F -40°C to 40°C | 23°F to 104°F -5°C to 40°C | -40°F to 122°F -40°C to 50°C | |||||||
| Relative Humidity | 5 – 95% RH non-condensing | |||||||||||
| Location | Indoor or outdoor. Explosion proof for Class I, Div. 1, Groups B, C, D. | |||||||||||
| Operating Voltage | 10 VDC – 30 VDC | |||||||||||
| Outputs | ||||||||||||
| Analog | Linear 4-20 mA signal, into 1000 ohms impedance max (24DC), 0 – 500 ohms max (12VDC) corresponding to 0 – full scale | |||||||||||
| Digital | Modbus RTU output standard, fully configurable, 2-wire RS-485, 1200 to 19.2k baud | |||||||||||
| Approvals | 65-2640RK | 65-2641RK UL | C CSA US | C UL US | ||||||||
| 65-2640RK-05 | 65-2641RK-05 | |||||||||||
| Controllers | Beacon 110, Beacon 200, Beacon 410A, Beacon 800 as well as most DCS / PLC systems | |||||||||||
| Warranty | One year material and workmanship | |||||||||||
| O2 Oxygen | H2S Hydrogen Sulfide | CO Carbon Monoxide | Toxics See Chart Below | CO2 Carbon Dioxide | ||
| Part# | 65-2666RK *65-2644RK | 65-2662RK | 65-2663RK | See Chart Below | 65-2661RK-02 65-2661RK-03 65-2661RK-05 65-2661RK-10 | |
| Sensors | Galvanic cell | Electrochemical | Infrared | |||
| Measuring Ranges | 0-25% Vol. | 0-100 ppm | 0-300 ppm | See Chart Below | -02 | 0 – 5000 ppm |
| -03 -05 | 0 – 5% Vol. 0 – 50% Vol. | |||||
| -10 | 0 – 100% Vol. | |||||
| Resolution | 0.1% Vol. | 1 ppm | See Chart Below | 20 ppm / 0.01% Vol. / 0.1% Vol. / 1%Vol. | ||
| Lower Detectable Limit (LDL) | 0.1% Vol. | 2% of full scale | ||||
| Response Time (T-90) | 35 Seconds or less | 60 Seconds or less | 30 Seconds or less | |||
| Max Current Draw (24VDC) | 125 mA with alarm 1 and alarm 2 active and all relays energized | 160 mA with alarm 1 and alarm 2 active and all relays energized | ||||
| Life Expectancy | 2 to 3 years with normal service | 5 years plus | ||||
| Accuracy (which ever is greater) | ± 0.5% Vol. O2 | ± 5% of reading or | ± 5% of reading or | ± 10% of reading or | ± 5% of reading or | |
| Alarms | ||||||
| Alarm Settings | Two fully programmable alarm set points, increasing / decreasing, latching / self-resetting, on delays, off delays, normally energized or de-energized, | |||||
| Alarm Indication | Visual LEDs. Alarm 1=Amber; Alarm 2=Red; Fail=Red | |||||
| Relays | 5 Amp form ‘C’ contacts for alarm 1, alarm 2, and fail | |||||
| Physical | ||||||
| Dimensions | Height: 8.5” (215 mm), Width: 5.2” (132 mm), Depth: 4.5” (114 mm) | |||||
| Display | Alphanumeric OLED display. 8 characters per line; 2 lines for gas concentration readout, plus user-friendly calibration and setup | |||||
| Sensor Rating | Non explosion proof construction, designed for Class I, Div. 2, Groups B, C, D (no certification) | |||||
| Housing J-Box | NEMA 4X, explosion proof, watertight, cast aluminum with o-ring seal and epoxy powder coating | |||||
| Controls | Magnet used for calibration functions. Calibrates without opening the housing. Internal push-button controls also available for calibration and setup | |||||
| Sensor | Aluminum / Plastic (non explosion proof) | |||||
| Operating Environment | ||||||
| Operating Temperature | -4°F to 113°F | -40°F to 104°F -40°C to 40°C | 23°F to 104°F -5°C to 40°C | 14°F to 104°F | -40°F to 122°F | |
| Relative Humidity | 5 – 95% RH non-condensing | |||||
| Location | Indoor or outdoor | |||||
| Operating Voltage | 10 VDC – 30 VDC | |||||
| Outputs | ||||||
| Analog | Linear 4-20 mA signal, into 1000 ohms impedance max (24DC), 0 – 500 ohms max (12VDC) corresponding to 0 – full scale | |||||
| Digital | Modbus RTU output standard, fully configurable, 2-wire RS-485, 1200 to 19.2k baud | |||||
| Controllers | Beacon 110, Beacon 200, Beacon 410A, Beacon 800 as well as most DCS / PLC systems | |||||
| Warranty | One year materials and workmanship | |||||
*Partial pressure sensor for helium (He) applications. Consult factory for details.
Specifications subject to change without notice.
Made in the USA
T2A Literature | |
| Product Datasheet | Operating Manuals |
 T2A Product Datasheet |  T2A Operator’s Manual |
