Stand Alone Explosion Proof Transmitter

Datasheet • Manual

The RKI M2™ is a state-of-the-art transmitter that can operate as an independent, stand-alone system or as part of an integrated system. The M2 connects with an analog or digital signal to virtually any controller, PLC, or DCS. Setup procedures are simplified with user friendly push buttons and LCD menus. 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 housing of the M2 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 Cl2, NH3, SO2, PH3, ASH3, and HCN.

The M2 represents the latest leading edge technology in sensor / transmitters today.

Features

Operates with or without a controller
Direct digital readout on backlit LCD
Available gases include
% LEL, H2S, CO, PPM HC, & CO2
Toxic gases include Cl2, NH3, SO2, HCN, and more
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 & LCD menus
Long-life sensors (2 + years typical)

Applications

Petrochemical plants
Refineries
Offshore drilling platforms
Water & wastewater treatment plants
Offshore oil rigs
Pulp & paper mills
Gas, telephone, & electric utilities
Parking garages
Manufacturing facilities
Steel
Automotive

Explosion Proof Specifications

Explosion Proof
IR Sensors
Non Explosion Proof
Toxic Sensors

Explosion Proof Sensors	LEL General Purpose	LEL H2 Specific	O2 Oxygen	H2S Hydrogen Sulfide	CO Carbon Monoxide
Part#	65-2610RK	65-2611RK	65-2613RK-05	65-2615RK-05	65-2616RK-05
	65-2610RK-05	65-2611RK-05
Sensors	Catalytic		Galvanic cell	Electrochemical
Measuring Ranges	0 - 100 % LEL		0 - 25.0% Vol.	0 - 100 ppm	0 - 300 ppm
Resolution	1% LEL		0.1% Vol.	1 ppm
Lower Detectable Limit (LDL)	2% of full scale		0.1% Vol.	2% of full scale
Response Time (T-90)	35 Seconds or less
Accuracy	± 0.5% 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
Life Expectancy	2 to 3 years with normal service	3 to 5 years with normal service	2 to 3 years with normal service
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 display with backlighting. 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	-4°F to 122°F -20°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	19 VDC - 30 VDC, 12 VOC versions available
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
Approvals	65-2610RK-05 UL	65-2611RK UL	CSA NRTL
	65-2610RK-05 C CSA US	65-2611RK-05 C CSA US
Controllers	Compatible with all RKI Beacon controllers, as well as most DCS / PLC systems: Beacon 110, Beacon 200, Beacon 410, Beacon 800, and Pioneer 4W and Pioneer 16R
Warranty	One year material and workmanship

Explosion Proof IR Sensors	CO2 Carbon Dioxide		CH4 Methane	HC Hydrocarbons
Part#	65-2630RK-02 65-2630RK-03 65-2630RK-05 65-2630RK-10		65-2619RK-CH4 65-2628RK-CH4	65-2619RK-HC
Sensors	Infrared
Measuring Ranges	-02 -03 -05 -10	0 - 5000 ppm 0 - 5% Vol. 0 - 50% Vol. 0 - 100% Vol.	0 - 100% LEL 0 - 100% Vol.	0 - 100% LEL
Resolution	20 ppm / 0.1% Vol.		1% LEL
Lower Detectable Limit (LDL)	2% of full scale
Response Time (T-90)	30 Seconds or less
Accuracy	+/- 5% of full scale (0.5% Volume for oxygen)
Life Expectancy	5 years plus with normal service
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 display with backlighting. 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	-4°F to 122°F -20°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	19 VDC - 30 VDC, 12 VOC versions available
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
Approvals	C UL US
Controllers	Compatible with all RKI Beacon controllers, as well as most DCS / PLC systems: Beacon 110, Beacon 200, Beacon 410, Beacon 800, and Pioneer 4W and Pioneer 16R
Warranty	One year material and workmanship

Non Explosion Proof	O2 Oxygen	H2S Hydrogen Sulfide	CO Carbon Monoxide	CO2 Carbon Dioxide
Part#	65-2613RK *65-2614RK	65-2632RK	65-2633RK	65-2631RK-02 65-2631RK-03 65-2631RK-05 65-2631RK-10
Sensors	Galvanic cell	Electro-chemical		Infrared
Measuring Ranges	0-25% Vol.	0-100 ppm	0-300 ppm	-02 -03 -05 -10	0 - 5000 ppm 0 - 5% Vol. 0 - 50% Vol. 0 - 100% Vol.
Resolution	0.1% Vol.	1 ppm		20 ppm / 0.1% Vol. / 1% Vol.
Lower Detectable Limit (LDL)	0.1% Vol.	2% of full scale
Response Time (T-90)	35 Seconds or less			30 Seconds or less
Life Expectancy	2 to 3 years with normal service			5 years plus
Accuracy	+/- 5% of full scale (0.5% Volume for oxygen)
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 display with backlighting. 8 characters per line; 2 lines for gas concentration readout, plus user-friendly calibration and setup
Sensor Rating	Non explosion proof construction, Class I, Div. 2, Groups B, C, D
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 122°F -20°C to 50°C			-4°F to 122°F -20°C to 50°C
Relative Humidity	5 - 95% RH non-condensing
Location	Indoor or outdoor.
Operating Voltage	19 VDC - 30 VDC, 12 VDC versions available
Outputs
Analog	Linear 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
Controllers	Compatible with all RKI Beacon controllers, as well as most DCS / PLC systems: Beacon 110, Beacon 200, Beacon 410, Beacon 800, and Pioneer 4W and Pioneer 16R
Warranty	One year materials and workmanship

Non Explosion Proof Toxic Assemblies
Ordering Information
Part Number With J-Box	Gas	Range	Resolution
65-2618RK-ASH3	Arsine (ASH3)	0 - 1.5 ppm	0.01 ppm
65-2618RK-NH3	Ammonia (NH3)	0 - 75.0 ppm	0.1 ppm
65-2618RK-Cl2	Chlorine (Cl2)	0 - 3.00 ppm	0.01 ppm
65-2618RK-PH3	Phosphine (PH3)	0 - 1.00 ppm	0.01 ppm
65-2618RK-HCN	Hydrogen Cyanide (HCN)	0 - 15.0 ppm	0.1 ppm
65-2618RK-SO2	Sulfur Dioxide (SO2)	0 - 6.00 ppm	0.01 ppm

Note: *Partial pressure sensor for helium applications. Consult factory for details.
Specifications subject to change without notice.
Made in the USA

Available Accessories

• Battery backup

• Remote horns & lights

• Calibration kits

• Flow through adaptor

• Calibration adaptors

• Air aspirator adaptor / panel

• Splash guards

• Dataloggers

Direct Interface with Beacon 110 / 200 / 410 / 800 Controllers

M2 Interface with controllers

M2 Wiring Matrix
	Number of Wires to Controller	Maximum Distance to Controller
		18 AWG wire	16 AWG wire	14 AWG wire
M2 Transmitter	3	2500 ft.	5,000 ft.	8,000 ft.

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