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Photoelectron Spectrometer
Manufactured by
Riken Keiki Co., Ltd.

Home | Fixed Systems | M2 Series
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Stand Alone Explosion Proof Transmitter M2 Series

Eclipse (14K jpg)
Features
  • Operates independent of a controller
  • Direct digital readout on backlit LCD
  • Available for LEL, H2S, CO, and O2
  • 4-20 mA & digital Modbus outputs standard
  • Non-intrusive calibration via magnetic wand
  • 2 fully programmable alarm relays & fail relay
  • H2 specific LEL version available
  • Infrared combustible version available
  • Patented water repellent sensor coating
  • User friendly setup push buttons & LCD menus
  • CSA, and/or UL approved

Industry Applications

  • Petrochemical plants
  • Refineries
  • Offshore drilling platforms
  • Water & wastewater treatment plants
  • Offshore oil rigs
  • Pulp & paper mills
  • Gas, telephone, & electric utilities
  • Parking garages
  • Manufacturing facilities
  • Steel
  • Automotive


The RKI M2™ is a state-of-the-art transmitter that can operate as an independent, stand-alone system or as part of a system connected with an analog or digital signal to virtually any controller, PLC, or DCS. The M2 series detects LEL combustibles, oxygen, hydrogen sulfide, or carbon monoxide. It utilizes a magnetic wand technique for performing non-intrusive calibration. The M2 provides an automatic zero drift correction feature, which results in more stable readings and reduces the need for adjustments due to sensor aging.

The M2 housing does not need to be opened for zeroing or calibration, making it unnecessary to declassify the area for routine maintenance. Internal push-buttons can also be used if the housing is opened. It is designed so that a complete field calibration can be performed by one person. The stainless steel flame arrestor that covers the sensor (LEL, H2S, CO, or XP Oxygen) is water repellent with a special patented water resistant coating.

The M2 provides a 4-20 mA output in addition to a Modbus digital output. It also has two levels of alarm with relays, plus a fail alarm with a relay. A digital display of the gas concentration, as well as alarm and status lights can be viewed through the front window.

The M2 represents the latest leading edge technology in sensor / transmitters today.



Sensors

LEL

02

H2S

CO

CO2

CH4

HC

Types

Catalytic

Galvanic cell

Electrochemical

Infrared

Part#

65-2610RK
65-2610RK-05

65-2611RK (H2 Specific)

65-2611RK-05

65-2613RK
65-2613RK-05 *65-2614RK

65-2615RK-05

65-2616RK-05

65-2630RK-03

65-2619RK-CH4

65-2619RK-HC

Measuring Ranges

0 - 100 % LEL

0 - 25.0 % Vol

0 - 100 ppm

0 - 300 ppm

0 - 5% Vol

0 - 100% LEL

Weather Resistant

Patented water repellent sensor coating (*Except for 65-2613RK and 65-2614RK)

Outputs

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

Alarms

Alarm Settings

Fully programmable alarm setpoints, increasing / decreasing, latching /
self-resetting, on delays, off delays, normally energized or de-energized,
programmable deadband, programmable smoothing filter

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 display with backlighting. 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 4, 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

-4°F ~ 122°F (-20°C ~ 50°C)

Relative Humidity

5 - 95% RH non-condensing

Location

Indoor or outdoor. Explosion proof for Class I, Div. 1, Groups B, C, and D. (Oxygen available in non XP version also)

Operating Voltage

19 VDC - 30 VDC

Approvals

65-2610RK-05
65-2611RK-05
C CSA US

65-2610RK-05

65-2611RK-05

C UL US

65-2613RK-05
C CSA US

C CSA US

C UL US

Warranty

One year material and workmanship

Note: IR LEL sensors are recommended for applications where catalytic sensors historically do not hold up, such as areas where catalytic poisons may be present (for example: silicone vapors, high H2S, or halogenated hydrocarbons). The IR LEL sensor is especially well suited for offshore oil rigs and wastewater treatment plants.

*Partial pressure sensor for helium applications. Consult factory for details.

Specifications subject to change without notice.

Made in the USA

Toll Free: (800) 754-5165 | Phone: (510) 441-5656 | 33248 Central Ave, Union City, CA 94587
Copyright © 2007 RKI Instruments, Inc.  All Rights Reserved