EC-600 Carbon Monoxide (CO) Standalone Gas Monitor by RKI Instruments

EC-600 CO Gas Monitor

EC-600 CO detector
EC-600 Alarm 1
EC-600 Indoor Carbon Monoxide Diffusion Gas Monitor remote sensor

Stand Alone Carbon Monoxide Gas Monitor


  • Compact, wall mounting design
  • Highly visible 3 color LED digital display
  • Power cable can enter from any direction
  • Stores alarm summary data
  • Built in audible and visual alarms
  • 115 VAC operation
  • Relay outputs for annunciation of alarms
  • Low cost plugin electrochemical sensor
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RI-600 High AlarmRI-600 Low AlarmRI-600Ox 600 oxygen deficiency detector on wallRKI’s Model EC-600 is an indoor monitor that detects Carbon Monoxide (CO) with a range of 0-150 ppm. It’s a sleek low profile design which lends itself to

laboratory or commercial applications. The EC-600

comes ready to operate with a simple wall mount bracket and 10 foot power cord. If Carbon Monoxide is present, the user is notified by an audible alarm tone and multicolored LED display.

The EC-600 uses a fast responding low-cost plug-in style electrochemical sensor. This long life sensor is field-replaceable with no special tools required.

Related Services

Fixed Systems Turnkey Solutions

  • Design, Consultations, and Engineering
  • Installation
  • Start-up
  • Training
  • System Maintenance



  • Iron and steel industry
  • Laboratories
  • Boiler rooms
  • Garages
  • Vehicle service areas
  • Engine testing
  • Shipping / receiving docks
  • Multi-occupancy residences


Measuring Gas
Carbon monoxide (CO)
Sampling Method
Dimensions 95(W) x 135(H) x 35(D)mm

Approx. 420g (Approx. 220g in case of DC 24V version)
3 digits, 3 color LED (Green, Orange, Red) Normal: Green
Wall mounting type (by using accessory mounting plate or mount at one switch box) Cable inlet: Up, down and left/right, or rear side
Operating Temp 0-40ºC (0 to 104ºF)
Humidity below 90% RH (non-condensing)

Sensor Types Electrochemical
Ranges 0-150ppm (1ppm / digit)

Type of Alarms Gas alarm: 2 level alarm (Latched mode / cancelled by reset switch)
Trouble alarm: Sensor connection trouble (Non-latched mode)
Preset Alarm Levels 1st: 50 ppm, 2nd: 100 ppm
Relays AL1 / AL2 Form A common, contact capacity: 125V 1A (Resistive load)
Visual 1st Alarm: Flashing orange LED with gas display
AL1 LED orange color flashing, intermitted buzzer sound

2nd Alarm: Flashing red LED gas display
AL2 LED red color flashing, intermittent buzzer sound

Trouble Alarm: Red flashing display “D-**” (**shows error No), short intermittent buzzer sound

Power AC 115V 50/60Hz, Power consumption: Max 3.5VA, Power cable: 3m accessory (standard)

Option: (DC 24V, Power consumption: MAX 2.0 W)

Warranty One year materials and workmanship.

Carbon Monoxide and it’s reaction / poisoning to humans

CO (ppm)
Human reaction and poisoning
No noticeable effect after breathing in for a few hours.
Sight headache is felt after breathing for about 1.5 hours.
A headache, nausea and dizziness etc. are caused after breathing around 1 hour.
Loss of consciousness breathing about 1 to 1.5 hours.
A headache, dizziness, nausea will be severe after breathing for about 30 min. to 1 hour and a sense will be lost.
Immediate death

LV: 5.0 ppm (Japan industrial hygiene society recommendation)
25 ppm (ACGIH recommendation in USA)

* Specifications subject to change without notice.

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