Gas Monitor
Total Analytical Solution 
D-2-4, Setia Walk, Pusat Bandar Puchong,
47160 Puchong, Selangor, Malaysia
 
Tel: + 6012-921 3877; 603-5879 7121
Fax: +018 635 1593
Email: ancor.my@gmail.com
            sales@gasmonitors.com.my
   Home      RKI M2A Series
 
 
 
M2A Series

Stand Alone Explosion Proof Transmitter

 
 
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 LCD 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 and CO2. For CO2, a general purpose (not explosion proof) construction is also available.

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

The “A” version of the M2 style instrument includes several improvements over the past design. This includes an OLED display for cold temperature operation (to -40 C or F), side access conduit opening for better leak protection, improved RFI/EMI resistance, and superior protection against power surges or spikes.

 

Features

  • Operates with or without a controller
  • Direct digital readout with OLED display
  • Available gases include LEL and CO2
  • 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 - 5 years typical for catalytic, 5 -10 years typical for IR)
 
 
Applications
  • Petrochemical plants
  • Refineries
  • Water & wastewater treatment plants
  • Pulp & paper mills
  • Manufacturing facilities
  • Automotive
  • Semiconductor plants
  • Chemical plants
 
 
Specificatios
Explosion Proof
 
 

LEL

General Purpose

LEL

H2 Specific

CH4

Methane

HC

Hydro-carbons

CO2

Carbon Dioxide

Part#

65-2640RK 65-2641RK 65-2619RK-CH4

65-2628RK-CH4
65-2619RK-HC 65-2660RK-02
65-2660RK-03
65-2660RK-05
65-2660RK-10
65-2640RK-05 65-2641RK-05

Sensors

Catalytic Infrared

Measuring Ranges

0 - 100 % LEL 0 - 100% LEL
0 - 100% Vol.
0 - 100% LEL -02
-03
-05
-10
0 - 5000 ppm
0 - 5% Vol.
0 - 50% Vol.
0 - 100% Vol.

Resolution

1% LEL 1% LEL / 1% Vol. 20 ppm / 0.1% Vol.

Lower Detectable Limit (LDL)

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
3 to 5 years with normal service 5 years plus with normal service

Accuracy
(which ever is greater)

± 5% of reading or ± 2 % LEL ± 5% of reading or ± 2 % of full scale

Weather Resistant

Patented water repellent sensor coating

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

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 Temperature

-40°F to 167°F, -40°C to 75°C -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 VDC versions available

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

65-2640RK-05
UL
65-2641RK
UL
(all IR) 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 and Beacon 800

Warranty

One year material and workmanship
 
 
 
 
 
 
D-2-4, Setia Walk, Pusat Bandar Puchong,
47160 Puchong, Selangor, Malaysia

Tel: + 6012-921 3877; 603-5879 7121
Fax: +018 635 1593
Email: ancor.my@gmail.com 
           sales@gasmonitors.com.my