

The RKI M2 is a state-of-the-art transmitter that can operate as an independent, stand-alone system or as part of a system connected with an analog or digital signal to virtually any controller, PLC, or DCS. The M2 series detects LEL combustibles, oxygen, hydrogen sulfide, or carbon monoxide. It utilizes a magnetic wand technique for performing non-intrusive calibration. The M2 provides an automatic zero drift correction feature, which results in more stable readings and reduces the need for adjustments due to sensor aging.
The M2 housing does not need to be opened for zeroing or calibration, making it unnecessary to declassify the area for routine maintenance. Internal push-buttons can also be used if the housing is opened. It is designed so that a complete field calibration can be performed by one person. The stainless steel flame arrestor that covers the sensor (LEL, H2S, CO, or XP Oxygen) is water repellent with a special patented water resistant coating.
The M2 provides a 4-20 mA output in addition to a Modbus digital output. It also has two levels of alarm with relays, plus a fail alarm with a relay. A digital display of the gas concentration, as well as alarm and status lights can be viewed through the front window.
The M2 represents the latest leading edge technology in sensor / transmitters today.
Features
Applications
Specifications
| Sensors |
LEL |
02 |
H2S |
CO |
CO2 |
CH4 |
HC |
|
Types |
Catalytic |
Galvanic cell |
Electrochemical |
Infrared |
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|
Part# |
65-2610RK 65-2610RK-05 65-2611RK (H2 Specific) 65-2611RK-05 |
65-2613RK 65-2613RK-05 *65-2614RK |
65-2615RK-05 | 65-2616RK-05 | 65-2630RK-03 | 65-2619RK-CH4 65-2619RK-HC |
|
|
Measuring Ranges |
0 - 100 %LEL |
0 - 25.0 % Vol | 0 - 100 ppm | 0 - 300 ppm | 0 - 5% Vol | 0 - 100% LEL | |
|
Weather Resistant |
Patented water repellent sensor coating (*Except for 65-2613RK and 65-2614RK) | ||||||
| Outputs | |||||||
|
Analog |
4-20 mA signal, into 500 ohms impedance max, corresponding to 0 - full scale | ||||||
|
Digital |
Modbus RTU output standard, fully configurable, 2-wire RS-485, 1200 to 19.2k baud | ||||||
| Alarms | |||||||
|
Alarm Settings |
Fully programmable alarm setpoints, increasing / decreasing, latching / self-resetting, on delays, off delays, normally energized or de-energized, programmable deadband, programmable smoothing filter |
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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 display with backlighting. 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 4, explosion proof, watertight, cast aluminum with o-ring seal and epoxy powder coating |
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|
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 |
-4°F ~ 122°F (-20°C ~ 50°C) | ||||||
|
Relative Humidity |
5 - 95% RH non-condensing | ||||||
|
Location |
Indoor or outdoor. Explosion proof for Class I, Div. 1, Groups B, C, and D. (Oxygen available in non XP version also) | ||||||
| Operating Voltage | 19 VDC - 30 VDC | ||||||
| Approvals | 65-2610RK-05 65-2611RK-05 C CSA US 65-2610RK-0565-2611RK-05C UL US 65-2613RK-05 C CSA US |
C CSA US | C UL US | ||||
| Warranty | One year material and workmanship | ||||||
Note: IR LEL sensors are recommended for applications where catalytic sensors historically do not hold up, such as areas where catalytic poisons may be present (for example: silicone vapors, high H2S, or halogenated hydrocarbons). The IR LEL sensor is especially well suited for offshore oil rigs and wastewater treatment plants.