by Fmeaddons

RI-600 CO2 Monitor

RI-600 Stand Alone Carbon Dioxide Monitor


  • Operates with or without a controller
  • Long life NDIR sensor
  • Large easy to read digital display
  • Two power options: 115 VAC, 24 VDC
  • Compact wall mount design
  • Tri-color visual alarm display
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RKI’s Model RI-600 measures carbon dioxide in the air. The RI-600 displays the measured carbon dioxide concentration on the LCD. If a high level of CO2 is present, the user is notified by an audible alarm tone and the multicolored LCD digital display. The monitor outputs an analog 4~20mA signal and gas alarm relay contacts open or close when the carbon dioxide concentration rises above preset alarm set point.

The Model RI-600 applies Non-Dispersive Infrared Ray Absorption (NDIR) technology to detect CO2. The infrared beam emitted from the light source passes through the gas cell and reaches the IR sensor. When CO2 enters the gas cell, the amount of infrared energy received by the IR sensor decreases since the infrared energy emitted from the IR source is absorbed by the CO2. This decreased energy is detected by the IR sensor and is displayed as a gas concentration. An optical band pass filter in front of the IR sensor passes the CO2’s absorption wave length. Power options are 115 VAC or 24 VDC. The RI-600 has two preset alarms, and comes ready to operate with a simple wall mount bracket and 10 foot power cord.


  • Brewing Tanks
  • Filler Machines
  • Storage Tanks
  • Bag & Box Rooms
  • Indoor Air Quality
  • Greenhouse


Model RI-600 Specifications

Detection Principle

Non-Dispersive Infrared

Gas Detected

Carbon dioxide (CO2)

Detection Range

0 – 2,000 ppm

0 – 5,000 ppm

0 – 10,000 ppm

0 – 2% Vol.

0 – 5% Vol.

Display Resolution

0 – 2,000 ppm: 1 ppm

0 – 2,000 ppm: 1 ppm
2,000 – 10,000 ppm: 10 ppm

0 – 2% Vol.: 0.005% Vol.

0 – 2% Vol.: 0.005% Vol.
0 – 5% Vol.: 0.010% Vol.

Alarm Points (adjustable)

1st: 1,000 ppm

2nd: 2,000 ppm

1st: 1,000 ppm

2nd: 5,000 ppm

1st: 1,000 ppm

2nd: 5,000 ppm

1st: 0.5% Vol.

2nd: 2.0% Vol.

1st: 0.5% Vol.

2nd: 3.0% Vol.

Sampling Method


Indication Accuracy

Within ±5 % of full scale (to the gas concentration signal output)

Response Time

90% response (T90) within 60 seconds

Gas Alarm Type

Two-step alarm (H-HH)

Alarm Display

First: Backlight LED is orange, buzzer

Second: Backlight LED is red, buzzer

Alarm Pattern


Alarm Contact

No-voltage contact 1a or 1b and normally de-energized

(energized in response to an alarm)


LCD digital display (Five – digit, seven segment / green, orange and red backlight)

*No backlight by standard setting

Trouble Alarm / Self-Diagnosis

System abnormalities / sensor connection abnormalities

Trouble Alarm Display

Backlight LED flashes orange, buzzer

*No backlight and no buzzer by standard setting

Trouble Alarm Pattern


Relay Contact Rating

125 VAC – 1A or 30 VDC – 1 A (resistance load) 0 VAC ±10% (50/60 Hz) or, 24 VDC ±10%


CE marking standard

Output Signal

4~20 mA DC (no-insulation/load resistance under 300 Ω)

Power Sources

110 VAC ±10% (50/60 Hz) or 24 VDC ±10%

Power Consumption

AC specification: Max. 6VA

DC specification: Max. 4W

Operating Temperature

32 ~ 104°F (0 ~ 40ºC) (At a constant conditions)

Operating Humidity

Below 90% RH (Non-condensing)

Mounting Equipment

Wall mounting type (by using accessory mounting plate or mount at one switch box)

Cable inlet: Up, down and left/right, or rear side


Body: approx. 3.15”(W) x 4.72”(H) x 1.2”(D) (80(W) x 120(H) x 35.5(D)mm)


AC specification: approx. 7.05 oz (200g), DC specification: approx. 6.34 oz (180g)


One year materials and workmanship

  * Specifications subject to change without notice.


Click Here For Download pdf File

RI-600 DatasheetRI-600 Manual