Riken Keiki OX-600 Stand Alone Oxygen Monitor


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OX-600 O2 Monitor, Stand Alone Oxygen Monitor

The OX-600 is an indoor, standalone monitor that detects Oxygen (O2) with a range of 0-25.0 % volume with 0.1% increments. It’s sleek, low-profile design is equipped with a unique tri-color display, which changes color as oxygen levels reach each alarm level. The OX-600 has 2 preset alarms, and comes ready to operate with a simple wall mount bracket and 10 foot power cord. It is capable of operating with three different power options; 115 VAC, 24 VDC or alkaline batteries. If Oxygen is present, the user is notified by an audible alarm tone and the multicolored LED digital display.

The OX-600 uses a fast responding low-cost plug-in style galvanic cell sensor. This long life sensor is field-replaceable with no special tools required. The sensor can also be remotely mounted with an optional remote sensor cable.

Extender cable with remote box available in different lengths (3, 5, 10, or 20 meters)

Riken Keiki OX-600 Features

Operates with or without a controller
Range of 0-25.0 % volume with 0.1% increments
Tri-color visual alarm display
2 preset alarms; Green=Normal, Yellow=Alarm 1, Red=Alarm 2
Large easy to read digital display
Three power options: 115 VAC, 24 VDC, or 2 AA alkaline
Operates up to 1 year on one set of AA alkaline batteries
Pressure compensation eliminates false alarms caused by pressure change
Remote mount sensor cable available

Riken Keiki OX-600 Application

Cryogenic environments
Clean rooms
Industrial gas facilities
Gas storage rooms
Indoor monitoring
Iron and steel industry
Tunnels and garages
Vehicle service areas

Riken OX-600 Quick Spec

  • Category Fixed gas detector
  • Type Stand-alone gas detector
  • Detection principle Galvanic cell
  • Detection range 0-25.0 vol%
  • Sampling method Diffusion
  • Approvals CE
  • Power source 100VAC +/- 10% 50/60Hz, DC24V +/- 10%, Alkaline battery (AA size) x 2 pcs
  • Dimensions & Weight 80(W)×120(H)×35.5(D) mm,
  • 200g (100VAC), Approx. 180g (DC24V), Approx. 230g (Alkaline battery)
  • Operating temperature & Humidity 0 to 40oC, Below 90%RH


Riken Keiki

The RIKEN KEIKI (KRI) product lineup includes more than 100 types of gas detectors and environmental monitoring products. Riken Keiki (RKI) Single gas detector range: 
  • 03 Series Smallest Single Gas Monitor
  • GasWatch 3 – Smallest Gas Monitor
  • 04 Series Smallest Toxic Gas Monitor
  • FP-31 Formaldehyde Gas Detector
  • SP-220 Gas Leak Checker for Combustible, Toxic, Freon and Fumigation Gases
  • SC-8000 Portable Toxic Gas Monitor
Riken Keiki (RKI) Multi-gas detector range: 
  • GX-3R Personal Gas Detector
  • GX-3R Pro Gas Detector with Wireless Communication
  • GX-6000 PID Gas Monitor
  • GX-2012 Confined Space Gas Monitor
  • GX-2009 Portable Multi Gas Detector
  • Gas Tracer PPM Leak Detector
  • Eagle 2 Multi Gas Detector for LEL, O2, H2S, CO, VOC & Toxics
  • Eagle Gas Detector
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Detection Principle Galvanic cell
Gas Detected Oxygen (O2)
Detection Range 0 ~ 25 vol%
Display Resolution 0.1 vol%
Sampling Method Diffusion or remote sampling method with optional extender cable
Indication Accuracy* Within ±0.7 vol%
Response Time* 90% Response within 30 seconds
Alarm Delay Time* Within 5 seconds, after detecting 10 ~ 11 vol% gas at Oxygen deficiency alarm (18 vol% alarm).
Alarm Accuracy* Within ±1 vol% of preset alarms
Alarm Levels Two preset alarms (L-LL), alarm 1 = 19.0% vol, alarm 2 = 18.0% vol (other settings available)
Display of Alarm 1st gas alarm: gas concentration reading blinks or orange light, flashing AL1 light or orange light, buzzer
2nd gas alarm: gas concentration reading blinks or red light, flashing AL2 light or red light, buzzer
Alarm Method Latching or Non-latching
Alarm Contact Dry contact, Form A or Form B, Form A standard Factory Setting, normally open (closed in ALARM)
Display Digital LCD (3 digits, 7 segments / Green, Orange, Red) (For Alkaline battery version, the back light will be OFF during normal operation)
Trouble Alarm / Self-Diagnosis System trouble / sensor connection trouble
Display of Trouble Alarm Buzzer / content indication (flashing of red error message)
Trouble Alarm Method Non-latching or Latching
Contact Capacity 125VAC, 1A or 30VDC, 1A (Resistive load)
Output Signal 4 ~ 20mA (Non-isolated, Resistive load under 300Ω) or 0DC-1V (Non-isolated) *only for 0DC-1V Alkaline battery specification
Extender Cable Extender cable with remote box (3m, 5m, 10m or 20m lengths available)
Power Sources 120VAC±10%, 50/60Hz, 24VDC±10%, or AA alkaline battery (2 each)
Power Consumption AC specification: MAX 3.5VA, DC specification: MAX 2W
Continuous Operation (for Alkaline Battery version) 1 year (no alarm, no indication)
Initial Clear About 25 seconds
Operating Temperature 0 ~ 104°F (no sudden change)
Operating Humidity Below 90%RH (non-condensing)
Mounting Equipment Wall mounting, sensor integrate type or remote type
Dimension Body: approx. 3.15”(W) x 4.72”(H) x 1.2”(D) (80(W) x 120(H) x 35.5(D)mm) Remote sensor: approx. 1.57”(W) x 3.78”(H) x 1.2”(D) 40(W) x 96(H) x 35.5(D)mm (exclude the protrusion)
Weight AC specification: approx. 7.05 oz (200g), DC specification: approx. 6.34 oz (180g), Alkaline battery specification: approx. 8.11 oz (230g) Remote sensor: approx. 1.94 oz (55g) (exclude the cable)
Warranty One year materials and workmanship

*Under normal conditions

O2 Symptoms
23.5% OSHA limit for increased levels of oxygen
20.9% Oxygen content in normal air
19.5% – 12% Increased pulse and respiration
12% – 10% Disturbed respiration, fatigue, faulty judgment
10% – 6% Nausea, vomiting, inability to move, loss of consciousness and death
6% – 0% Convulsions, cardiac arrest and death

Remote sensor

  • Cable length: 3m, 5m, 10m, 20m (specify when ordering)
  • Cable used: EM-MEES (0.5sq), 2-core

* Specifications subject to change without notice.


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