Stand Alone Explosion Proof Transmitter
M2A-XL Stand Alone Transmitter
Features
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, NO2, & 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)
The RKI M2A-XL 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-XL 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-XL 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-XL 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, NO2 and SO2
The M2A-XL represents the latest leading edge technology in sensor / transmitters today.
Related Services
Fixed Systems Turnkey Solutions
Design, Consultations, and Engineering
Installation
Start-up
Training
System Maintenance
Petrochemical plants
Refineries
Water & wastewater treatment plants
Pulp & paper mills
Manufacturing facilities
Automotive
Semiconductor plants
Chemical plants
Specifications - Explosion Proof Transmitters (Class I, Div. 1 , Groups B, C, D)
Combustibles
LEL H2 Specific
O2 Oxygen
H2S Hydrogen Sulfide
CO Carbon Monoxide
CH4 Methane
HC Hydrocarbons
CO2 Carbon Dioxide
LEL
PPM
Part#
UL
65-2640XL
65-2647XL
65-2641XL
65-2643XL-05
65-2645XL-05
65-2646XL-05
65-2649XL-CH4
65-2658XL-CH4
65-2649XL-HC
65-2660XL-02
65-2660XL-03
65-2660XL-05
65-2660XL-10
CSA
65-2640XL-05
65-2647XL-05
65-2641XL-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% LEL
± 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: 6.2” (158 mm), Width: 5.66” (144 mm), Depth: 4.86” (124 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 122°F
-20°C to 50°C
-40°F to 122°F
-40°C to 50°C
-4°F to 122°F
-20°C to 50°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
65-2640XL UL
65-2641XL
UL
C CSA US
C UL US
65-2640XL-05 C CSA US
65-2641XL-05 C CSA US
Controllers
Beacon 110, Beacon 200, Beacon 410A, Beacon 800, Beacon 3200 as well as most DCS / PLC systems
Warranty
One year material and workmanship
Specifications - Toxic Gas Transmitters (Class I, Div. 2)
O2 Oxygen
H2S Hydrogen Sulfide
CO Carbon Monoxide
Toxics
CO2 Carbon Dioxide
Part#
65-2666XL
*65-2644XL
65-2662XL
65-2663XL
See Chart Below
65-2661XL-02
65-2661XL-03
65-2661XL-05
65-2661XL-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
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: 6.2” (158 mm), Width: 5.66” (144 mm), Depth: 4.86” (124 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, Beacon 3200 as well as most DCS / PLC systems
Warranty
One year materials and workmanship
M2A-XL Toxic Transmitter Sensor Ordering Information
Part Number With J-Box
Gas
Range
Resolution
Sensor Type
65-2670XL-NH3-75
Ammonia (NH3)
0 – 75.0 ppm
0.1 ppm
CT-7
65-2670XL-NH3-1
Ammonia (NH3)
0 – 100 ppm
1 ppm
CT-7
65-2670XL-NH3-2
Ammonia (NH3)
0 – 200 ppm
1 ppm
CT-7
65-2670XL-NH3-5
Ammonia (NH3)
0 – 500 ppm
1 ppm
CT-7
65-2648XL-AsH3
Arsine (AsH3)
0 – 1.50 ppm
0.1 ppm
ESM -01
65-2670XL-CL2-3
Chlorine (Cl2)
0 – 3.00 ppm
0.01 ppm
CT-7
65-2670XL-CL2-5
Chlorine (Cl2)
0 – 5.00 ppm
0.01 ppm
CT-7
65-2670XL-CL2-10
Chlorine (Cl2)
0 – 10.0 ppm
0.1 ppm
CT-7
65-2670XL-CLO21
Chlorine Dioxide (ClO2)
0 – 1.00 ppm
0.01 ppm
CT-7
65-2670XL-CLO21
Chlorine Dioxide (ClO2)
0 – 1.00 ppm
0.01 ppm
CT-7
65-2670XL-CLO23
Chlorine Dioxide (ClO2)
0 – 3.00 ppm
0.01 ppm
CT-7
65-2670XL-CLO25
Chlorine Dioxide (ClO2)
0 – 5.00 ppm
0.01 ppm
CT-7
65-2670XL-HCN15
Hydrogen Cyanide (HCN)
0 – 15.0 ppm
0.1 ppm
CT-7
65-2670XL-NO2
Nitrogen Dioxide (NO2)
0 – 15.0 ppm
0.1 ppm
CT-7
65-2648XL-PH3
Phosphine (PH3)
0 – 1.00 ppm
0.01 ppm
ESM -01
65-2670XL-SO210
Sulfur Dioxide (SO2)
0 – 6.00 ppm
0.01 ppm
CT-7
M2A-XL Literature
Product Datasheet
Operating Manuals
M2A-XL Datasheet
M2A-XL Operator’s Manual
