EC-600, Indoor Carbon Monoxide (CO) Monitor

Manufacturer: RKI Instruments
Part Number: EC-600
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RKI’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.

Measuring Gas:  Carbon Monoxide (CO) Sampling Method:  Diffusion Physical Dimensions:   95(W) x 135(H) x 35(D) mm

Weight:  Approx. 420 g (Approx. 220 g in case of DC 24V version) Display:  3 digits, 3 color LED (Green, Orange, Red)

Normal:  Green Mounting:  Wall mounting type (by using accessory mounting plate or mount at one switch box).

Cable Inlet:  Up, down and left/right, or rear side. Environmental Operating Temperature:  0 - 40ºC (0 - 104ºF). Relative Humidity:  Below 90% RH (non-condensing).

Sensors:  Sensor Types Electrochemical Measuring Ranges:  0 - 150 ppm (1 ppm/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, intermittent 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 Number), short intermittent buzzer sound.

Power:  AC 115 V 50/60 Hz

Power Consumption:  Max 3.5 VA

Power Cable:  3 m accessory (standard)

Option:  (DC 24 V, 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.
Slight 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 - 1.5 hours.
A headache, dizziness, nausea will be severe after breathing for about 30 min. - 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.

  • Iron and Steel Industry
  • Laboratories
  • Boiler Rooms
  • Garages
  • Vehicle Service Areas
  • Engine Testing
  • Shipping/Receiving Docks
  • Multi - Occupancy Residences