M2A transmitter

M2A Series

Stand Alone Explosion Proof Transmitter

Features

  • Operates with or without a controller
  • Direct digital readout with OLED display
  • Available gases include:
    • LEL, O2, H2S, CO, CO2, and 100% Vol CH4
    • Toxic gases include 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)
Category:
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Product 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, SO2, PH3, AsH3, and HCN.

The M2A represents the latest leading edge technology in sensor / transmitters today.

Application

  • Petrochemical plants
  • Refineries
  • Water & wastewater treatment plants
  • Pulp & paper mills
  • Manufacturing facilities
  • Automotive
  • Semiconductor plants
  • Chemical plants

Overview

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, SO2, PH3, AsH3, and HCN.

The M2A represents the latest leading edge technology in sensor / transmitters today.

Specifications

Explosion Proof

LEL

General Purpose

LEL

H2 Specific

O2

Oxygen

H2S

Hydrogen Sulfide

CO

Carbon Monoxide

CH4

Methane

HC

Hydro-carbons

CO2

Carbon Dioxide

Part# 65-2640RK 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
65-2640RK-05 65-2641RK-05
Sensors Catalytic Galvanic cell Electrochemical Infrared
Measuring Ranges 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 0.1% Vol. 1 ppm 1% LEL / 1% Vol. 20 ppm / 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
Response Time (T-90) 35 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: 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 Compatible with all RKI Beacon controllers, as well as most DCS / PLC systems:
Beacon 110, Beacon 200, Beacon 410, Beacon 800
Warranty One year material and workmanship

Non Explosion Proof

O2

Oxygen

H2S

Hydrogen Sulfide

CO

Carbon Monoxide

CO2

Carbon Dioxide

Part# 65-2666RK
*65-2644RK
65-2662RK 65-2663RK 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 -02 0 – 5000 ppm
-03 -05 0 – 5% Vol. 0 – 50% Vol.
-10 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
Max Current Draw (24VDC) 125 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
± 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 -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 Compatible with all RKI Beacon controllers, as well as most DCS / PLC systems:
Beacon 110, Beacon 200, Beacon 410, Beacon 800
Warranty One year materials and workmanship

Non Explosion Proof Toxic Assemblies

 

Toxic
Gas
Arsine (ASH3) Ammonia (NH3) Phosphine (PH3) Hydrogen Cyanide (HCN) Sulfur Dioxide (SO2)
Part#
With J-Box
65-2648RK-AsH3 65-2648RK-NH3 65-2648RK-PH3 65-2648RK-HCN 65-2648RK-SO2
Sensors Electro-chemical
Measuring Ranges 0 – 1.5 ppm 0 – 75.0 ppm 0 – 1.00 ppm 0 – 15.0 ppm 0 – 6.00 ppm
Resolution 0.01 ppm 0.1 ppm 0.01 ppm 0.1 ppm 0.01 ppm
Lower Detectable Limit (LDL) 2% of full scale
Response Time (T-90) 60 Seconds or less
Life Expectancy 2 to 3 years with normal service
Accuracy ± 10% of reading or
± 5% 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 14°F to 104°F
-10°C to 40°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 Compatible with all RKI Beacon controllers, as well as most DCS / PLC systems:
Beacon 110, Beacon 200, Beacon 410, Beacon 800
Warranty One year materials and workmanship

Specifications subject to change without notice.
Made in the USA

Download

M2A Literature

Product Datasheet Operating Manuals

M2A Datasheet
M2A Product Datasheet

Spanish M2A Datasheet

M2A Manual
M2A Operator’s Manual

Spanish M2A Manual