OX-600 Standalone Oxygen Monitor by RKI Instruments.

OX-600 O2 Monitor

OX-600 O2 monitor
OX-600 Alarm 1
OX-600 Alarm 2

Stand Alone Oxygen Monitor


  • 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
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OX-600 Alarm 2OX-600 Alarm 1OX-600 O2 monitorOx 600 oxygen deficiency detector on wallThe 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)

Related Services

Fixed Systems Turnkey Solutions

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



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


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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