by Fmeaddons

Stand Alone Explosion Proof Transmitter

Features

  • Operates with or without a controller
  • Direct digital readout with OLED
    cold temperature display
  • LEL, O2, H2S, CO, CO2,
    • 100% Vol CH4, and 0-9,000 PPM 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 & OLED
    menus
  • Long-life sensors (2+ years typical)

Contact RKI Sales

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

Specifications

Explosion Proof

 

 

Combustibles

LEL

H2 Specific

O2

Oxygen

H2S

Hydrogen Sulfide

CO

Carbon Monoxide

CH4

Methane

HC

Hydrocarbons

CO2

Carbon Dioxide

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

LEL

65-2640RK-05

65-2647RK-05

65-2641RK-05

Sensors

Catalytic

Galvanic cell

Electrochemical

Infrared

Measuring Ranges

0 – 100% LEL

0 – 9000
ppm

CH4

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

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

Beacon 110, Beacon 200, Beacon 410A, Beacon 800 as well as most DCS / PLC systems

Warranty

One year material and workmanship

 

Non Explosion Proof

O2

Oxygen

H2S

Hydrogen Sulfide

CO

Carbon Monoxide

Toxics

See Chart Below

CO2

Carbon Dioxide

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

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

 

M2A Non Explosion Proof Toxic Transmitter Sensor Ordering Information

Part Number With J-Box Gas Range Resolution Sensor Type
65-2648RK-NH3 Ammonia (NH3) 0 – 75.0 ppm 0.1 ppm ESM -01
65-2648RK-AsH3 Arsine (AsH3) 0 – 1.50 ppm 0.1 ppm ESM -01
65-2670RK-CL2 Chlorine (Cl2) 0 – 3.00 ppm 0.01 ppm CT-7
65-2670RK-CL210 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.

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