M2A Series
The RKI M2A is a state-of-the-art transmitter that can operate as an independent, stand-alone monitor or as part of an integrated system. The M2A connects with an analog or digital signal to virtually any controller, PLC, or DCS. Setup procedures are simplified with user friendly push buttons and OLED menus
Model: M2A Series
Manufacturer : RKI Instruments
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- Description
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M2A Literature |
Specifications
Explosion Proof Class I, Div. 2 , Groups B, C, D
Toxic Gas Transmitters Class I, Div. 2M2A Toxic Transmitter Sensor Ordering Information*Partial pressure sensor for helium (He) applications. Consult factory for details.
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| Combustibles | LEL | O2 | H2S | CO | CH4 | HC | CO2 | |||
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 ppmCH4 | 0 – 100% LEL | 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 or less | 60 Seconds or less | 90 Seconds or less | 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 | ± 5% of reading or ± 2% of full scale | ± 0.5% Vol. O2 | ± 5% of reading or ± 2 ppm H2S | ± 5% of reading or ± 5 ppm CO | ± 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 UL | 65-2641RK
UL | C CSA US | C UL US | ||||||||
65-2640RK-05 C CSA US | 65-2641RK-05 C CSA US | |||||||||||
Controllers | Beacon 110, Beacon 200, Beacon 410A, Beacon 800 as well as most DCS / PLC systems | |||||||||||
Warranty | One year material and workmanship | |||||||||||
O2 | H2S | CO | Toxics See Chart Below | CO2 | ||||||||
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 | ± 0.5% Vol. O2 | ± 5% of reading or ± 2 ppm H2S | ± 5% of reading or ± 5 ppm CO | ± 10% of reading or ± 5% of full scale | ± 5% of reading or ± 2% of full scale | |||||||
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
-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 | 14°F to 104°F
-10°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 | |||||||||||
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 | |||||||||||
| Part Number With J-Box | Gas | Range | Resolution | Sensor Type | |||||||
65-2670RK-NH3-75 | Ammonia (NH3) | 0 – 75.0 ppm | 0.1 ppm | CT-7 | ||||||||
65-2670-NH3-1 | Ammonia (NH3) | 0 – 100 ppm | 1 ppm | CT-7 | ||||||||
65-2670-NH3-2 | Ammonia (NH3) | 0 – 200 ppm | 1 ppm | CT-7 | ||||||||
65-2670-NH3-5 | Ammonia (NH3) | 0 – 500 ppm | 1 ppm | CT-7 | ||||||||
65-2648RK-AsH3 | Arsine (AsH3) | 0 – 1.50 ppm | 0.1 ppm | ESM -01 | ||||||||
65-2670RK-CL2-3 | Chlorine (Cl2) | 0 – 3.00 ppm | 0.01 ppm | CT-7 | ||||||||
65-2670RK-CL2-10 | Chlorine (Cl2) | 0 – 10.0 ppm | 0.1 ppm | CT-7 | ||||||||
65-2670RK-CLO2 | Chlorine Dioxide (ClO2) | 0 – 1.00 ppm | 0.01 ppm | CT-7 | ||||||||
65-2648RK-HCN | Hydrogen Cyanide (HCN) | 0 – 15.0 ppm | 0.1 ppm | ESM -01 | ||||||||
65-2648RK-PH3 | Phosphine (PH3) | 0 – 1.00 ppm | 0.01 ppm | ESM -01 | ||||||||
65-2648RK-SO2 | Sulfur Dioxide (SO2) | 0 – 6.00 ppm | 0.01 ppm | ESM -01 | ||||||||
- Operates with or without a controller
- Direct digital readout with OLED cold temperature display
- Available gases include
◦ LEL, O2, H2S, CO, CO2, and 100% Vol CH4
◦ Toxic gases include NH3, AsH3, Cl2, ClO2, HCN, & SO2 - Infrared sensor for combustibles and CO2
- 4-20 mA & digital Modbus outputs standard
- 2 fully programmable alarm relays & fail relay
- Non-intrusive calibration via magnetic wand
- Explosion proof construction
- Patented water repellent sensor cover
- User friendly setup, push buttons & OLED menus
- Long-life sensors (2 + years typical)
Description
The RKI M2A is a state-of-the-art transmitter that can operate as an independent, stand-alone monitor or as part of an integrated system. The M2A connects with an analog or digital signal to virtually any controller, PLC, or DCS. Setup procedures are simplified with user friendly push buttons and OLED menus. It utilizes a magnetic wand technique for performing non-intrusive calibration. The M2A provides an automatic zero drift correction feature, which results in more stable readings and reduces the need for adjustments due to sensor aging.
The housing of the M2A does not need to be opened for zeroing or calibration, making it unnecessary to declassify the area for routine maintenance. It is designed so that a complete field calibration can be performed by one person. Sensor construction is rated Class I, Div. 1 Groups B, C, D for flammables, CO, H2S, O2, and CO2, and Class I, Div. 2 for all other toxics.
The transmitter provides a 4-20 mA output in addition to a Modbus digital output. It also has two levels of alarms with relays, plus a fail alarm with relay. A digital display of the gas concentration, as well as alarm and status lights, can be viewed through the front window.
The toxic sensors are electrochemical type plug-in sensors, which provide high specificity, fast response, and long life. The plug-in design allows quick replacement in the field with no tools required. Toxic sensors are designed for use in Class I, Div. 2 hazardous locations. Sensors available for NH3, AsH3, Cl2, ClO2, HCN, PH3, and SO2
The M2A represents the latest leading edge technology in sensor / transmitters today.
