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Fixed Gas Detection

OX-600 Industrial Oxygen (O2) Depletion / Enrichment Monitor

Standalone Gas Detector for Oxygen (O2) Deficiency and Enrichment

The Riken Keiki OX-600 is an indoor stand-alone Industrial Oxygen (O2) Depletion and Enrichment monitor. The OX-600 is a low cost solution for use where Oxygen (O2) monitoring is required. Many facilities such as Laboratories and Hospitals store and use quantities of Inert Gas or Oxygen. Inert Gases like Nitrogen and Argon can rapidly displace Oxygen (O2) and can kill by asphyxiation as a result. Increased levels of Oxygen (O2), even by a few percent, can present a fire risk. Industrial Oxygen (O2) Depletion Detectors are very important in these applications. OX-600 is suitable for Oxygen (O2)  Depletion as well as Oxygen (O2)  Enrichment 

Gas Detection for Hospital Applications

Product Features

Visual and Audible Oxygen Alarms:

The OX-600 displays Oxygen (O2) levels on an LCD screen that changes colour at each alarm level. This is a unique feature of the Riken Keiki  600 series.

The Unit comes with preset alarms set to Low and Low Low . Users can program their own alarm levels if desired.  Users can access relay outputs for 1st and 2nd alarms in addition to a 4-20mA output. These features allow customers to connected optional external accessories such as additional sounders and beacons.

The Instrument comes ready to operate with a 24 VDC Power supply as well as a Battery Powered option. An optional 240VAC Main adapter is available.

Sensor Technologies :

The OX-600 has a low-cost  galvanic Oxygen(O2) sensor, in addition customers can replace the sensor in the field  without the need for special tools.

The sensor has a pressure compensation feature to avoid false alarms.

Remote Oxygen ( O2 ) Sensor:

As an option the OX-600 has an extender cable that allows the unit to be mounted outside the room with the sensor inside. Staff have the ability to ascertain the state of the room prior to entry as a result.

Optional accessories are available. These include a Battery backed UPS (WPSU-24 Series ) in addition to a sounder beacon(s) (Accessories) .

Typical OX-600 Applications are Laboratories , Hospitals , Gas Storage rooms , Clean rooms in addition to Cryogenics storage facilities and Warehouses

The OX-600 is a member of the 600 series of standalone monitors in addition this family includes OX-600, RI-600, EC-600, GM-600


Model Name OX-600
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 300O) or 0DC-1V (Non-isolated) *only for 0DC-1V Alkaline battery specification
Remote Extender Cable Extender cable with remote sensor head (3m, 5m, 10m or 20m lengths available)
(cable used: EM-MEES (o.5sq), 2-core)
Power Sources 24VDC±10%, or AA alkaline battery (2 each)
Power Consumption 24VDC specification: MAX 3W
Continuous Operation (for Alkaline Battery version) 1 year (no alarm, no indication)
Initial Clear About 25 seconds
Operating Temperature -10°C ~ 40°C (no sudden change)
Operating Humidity Below 90%RH (non-condensing)
Mounting Equipment Wall mounting, sensor integrate type or remote type
Dimension Body: approx. 80mm(W) x 120mm(H) x 35.5mm(D) / 3.15”(W) x 4.72”(H) x 1.2”(D)
Remote sensor (exclude the protrusion): approx. 40mm(W) x 96mm(H) x 35.5mm(D) / 1.57”(W) x 3.78”(H) x 1.2”(D)
Weight 24VDC specification: approx. 180g (6.34 oz), Alkaline battery specification: approx. 230g (8.11 oz) Remote sensor: approx. 55g (1.94 oz) (excluding cable)
*Under normal conditions
O2 Symptoms of O2 Deficiency
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

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