M2A Series by RKI Instruments
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$2,000.70 USD
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RKI Instruments M2A series stand-alone explosion-proof transmitter: operates as an independent monitor or as part of an integrated system, connecting by analog or digital signal to virtually any controller, PLC or DCS.
Gas options: LEL - H2 Specific, Hydrogen Sulfide (H2S), Hydrocarbons (HC), LEL, Oxygen (O2), Carbon Monoxide (CO), CH4 (0-100% Vol.), CH4 (0-100% LEL), CO2 (0-5.0% Vol.), CO2 (0-50% Vol.), CO2 (0-100% Vol.), CO2 (0-5000 ppm).
Key benefits
- Operates with or without a controller; direct digital readout on OLED cold-temperature display
- Gases: LEL, O2, H2S, CO, CO2 and 100% Vol CH4; toxics NH3, AsH3, Cl2, ClO2, HCN, PH3 and SO2; infrared sensor for combustibles and CO2
- 4-20 mA and digital Modbus outputs standard
- 2 fully programmable alarm relays plus fail relay
- Non-intrusive calibration via magnetic wand; housing need not be opened, so no need to declassify the area; one-person field calibration
- Automatic zero drift correction for more stable readings
- Explosion-proof construction; patented water-repellent sensor cover
- User-friendly push buttons and OLED menus
- Long-life sensors (2+ years typical)
- Sensor construction rated Class I, Div. 1, Groups B, C, D for flammables, CO, H2S, O2 and CO2; Class I, Div. 2 for other toxics
Specifications
| Combustibles | LEL H2 Specific |
O2 Oxygen |
H2S Hydrogen Sulfide |
CO Carbon Monoxide |
CH4 Methane |
HC Hydrocarbons |
CO2 Carbon Dioxide |
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| 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 (which ever is greater) |
± 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 ± 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 |
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| 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 | ||||||||
*Partial pressure sensor for helium (He) applications: consult factory for details.
Product information supplied by the manufacturer (RKI Instruments).
Product codes
- LEL - H2 Specific — SKU: 65-2641RK
- Hydrogen Sulfide (H2S) — SKU: 65-2645RK-05
- Hydrocarbons (HC) — SKU: 65-2649RK-HC
- LEL — SKU: 65-2640RK
- Oxygen (O2) — SKU: 65-2643RK-05
- Carbon Monoxide (CO) — SKU: 65-2646RK-05
- CH4 (0-100% Vol.) — SKU: 65-2658RK-CH4-4
- CH4 (0-100% LEL) — SKU: 65-2649RK-CH4-4
- CO2 (0-5.0% Vol.) — SKU: 65-2660RK-03
- CO2 (0-50% Vol.) — SKU: 65-2660RK-05
- CO2 (0-100% Vol.) — SKU: 65-2660RK-10
- CO2 (0-5000 ppm) — SKU: 65-2660RK-02
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