Name: M2A-XL Stand Alone Transmitter
Brand: RKI Instruments

Overview

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

Application

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

Download

M2A-XL Literature
Product Datasheet	Operating Manuals
M2A-XL Datasheet	M2A-XL Operator’s Manual

Distributor Resources

M2A-XL Price List & Resources
(Authorized Distributor Only)

M2A-XL Stand Alone Transmitter

Stand Alone Explosion Proof Transmitter

Features

Related Services

M2A-XL Literature

Contact Us

You Might Also Like