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Single Gas Detector

04 Series

The Personal single gas monitors Model 04 series are designed for long life as they have user replaceable sensors and filters. They can be operate nonstop up to 9,000 hours using 2 nos of AAA Alkaline batteries. Rechargeable versions also available. 04 Series Models have Audio, Visual and Vibration Alarms. User Adjustable 3 preset alarms are standard.

Changing sensors is quick, easy and inexpensive for user. Riken uses same series of sensors for 04 series, GX-3R & GX-3R Pro. Sensors come with 3 years manufacturer’s warranty*.

04 Series monitors are IP-67 certified. 04 Series instruments are safe for use in hazardous locations, classified as intrinsically safe ATEX/IECEx and by QPS to U.S. and Canadian standards for Class I, Division 1, Groups A, B, C, and D atmospheres.

* 3 year warranty on material and workmanship including sensors (1 year warranty for Ammonia and Chlorine sensors)

Individual Model Specifications

  • Specification
  • Accessories
Common Specifications
Sampling Method Diffusion Type
Alarm Type Gas alarms: Three-step alarms, STEL alarm, TWA alarm, OVER alarm
Fault alarms: Sensor connection/disconnection, low battery level, calibration failure, clock abnormality, system abnormality
Alarm Pattern Self-latching or auto-reset (*1)
Alarm Indications Flashing lamp, intermittent audible buzzer, flashing gas concentration readout, vibration
Buzzer Volume 80 dB or louder (at 30 cm)
Power Source*2 AAA alkaline batteries (×2) or AAA Ni-MH (eneloop) batteries (×2)
Explosion Proof Construction Intrinsically safe explosion-proof construction
<alkaline batteries>ATEX: II1G Ex ia IIC T4 Ga/IECEx: Ex ia IIC T4 Ga/Japan Ex: Ex ia IIC T4 Ga
<Ni-MH batteries>ATEX: II1G Ex ia IIC T3 Ga/IECEx: Ex ia IIC T3 Ga/Japan Ex: Ex ia IIC T3 Ga
Certifications ATEX, IECEx, Japan Ex, CE Marking
Protection Level Equivalent to IP66/67
External Dimensions/weight Approx. 54 mm (W) × 67 mm (H) × 24 mm (D) (excluding projections)/approx. 93 g
Functions Data logger, vibration, STEL alarm, TWA alarm, quick calibration, peak value display, temperature display
Individual Model Specifications
Model OX-04G OX-04 HS-04 CO-04 CO-04(C-) CX-04
Detection Target Gas Oxygen Oxygen Hydrogen Sulfide Carbon monoxide Carbon Monoxide (Hydrogen interference reduction) Carbon Monoxide Oxygen
Detection Principle Galvanic cell type Electrochemical Type
Display Range 0.0-40.0 % 0.0-40.0 % 0.0-200.0 ppm 0-2,000 ppm 0-2,000 ppm 0-2,000 ppm 0.0-40.0 %
Detection Range 0.0 - 25.0 % 0.0 - 25.0 % 0.0 100.0 ppm 0-500 ppm 0-500 ppm 0-500 ppm 0.0-25.0%
Resolution 0.1 % 0.1 % 0.1 ppm (0.0-30.0 ppm)
1.0 ppm (30.0-200.0 ppm)
1 pmm (0-300 ppm)
10 ppm (300-2,000 ppm)
1 pmm (0-300 ppm)
10 ppm (300-2,000 ppm)
1 pmm (0-300 ppm)
10 ppm (300-2,000 ppm)
0.1 %
Alarm Setpoints L 18.0 % LL 18.0 % H 25.0 % OVER 40.0% L 18.0 % LL 18.0 % H 25.0 % OVER 40.0% 1st 50 ppm 2nd 30.0 ppm 3rd 100.0 ppm TWA 1.0 ppm STEL 5.0 ppm OVER 200.00 ppm 1st 25ppm 2nd 50 ppm 3rd 1,200 ppm TWA 25 ppm STEL 200 ppm OVER 2,000 ppm 1st 25ppm 2nd 50 ppm 3rd 1,200 ppm TWA 25 ppm STEL 200 ppm OVER 2,000 ppm 1st 25ppm 2nd 50ppm 3rd 1,200 ppm TWA 25 ppm STEL 200 ppm OVER 2,000 ppm L 18.0 % LL 18.0 % H 25.0 % OVER 40.0%
Response time
T90 (*3)
Within 20 seconds
(Typical: 9 seconds)
Within 20 seconds
(Typical: 8 seconds)
Within 30 seconds
(Typical: 18 seconds)
Within 30 seconds
(Typical: 6 seconds)
Within 30 seconds
(Typical: 17 seconds)
Within 30 seconds
(Typical: 7 seconds)
Within 30 seconds
(Typical: 15 seconds)
Operating Temperature Range -20 °C - +50 °C
(no sudden fluctuations)
-40 °C - +60 °C (no sudden fluctuations)*4
Operating Humidity Range 10 - 90 % RH
(no condensation)
0 - 95 %RH (no condensation)*5
Continuous Operating Time (dry cell batteries)
(Ni-MH batteries)
Approx. 9,000 hours
Approx. 6,000 hours
Approx. 3,000 hours
Approx. 2,000 hour
Approx. 9,000 hours
Approx. 6,000 hours
Approx. 9,000 hours
Approx. 6,000 hours
Approx. 6,200 hours
Approx. 4,200 hours
Approx. 4,600 hours
Approx. 3,000 hours
Model SC-04 (SO2) SC-04 (NO2) SC-04 (HCN) SC-04 (PH2) SC-04 (NH2) SC-04 (CI2)
Detection Target Gas Sulfur dioxide Nitrogen dioxide Hydrogen cyanide Phosphine Ammonia Chlorine
Detection Principle Electrochemical Type
Display Range 0.00-100.00 ppm 0.00-20.00 ppm 0.0-30.0 ppm 0.00-20.00 ppm 0.0-400.0 ppm 0.00-20.00 ppm
Detection Range 0.00-20.00 ppm 0.00-20.00 ppm 0.0-30.0 ppm 0.00-20.00 ppm 0.0-300.0 ppm 0.00-10.00 ppm
Resolution 0.05 ppm 0.05 ppm 0.1 ppm 0.01 ppm 0.5 ppm 0.05 ppm
Alarm Setpoints 1st 2.00 ppm 2nd 500. ppm 3rd 100.00 ppm TWA 2.00 ppm STEL 5.00 ppm OVER 100.00 ppm 1st 2.00 ppm 2nd 4.00 ppm 3rd 20.00 ppm TWA 0.50 ppm STEL 1.00 ppm OVER 20.00 ppm 1st 10.0 ppm 2nd 20.0 ppm 3rd 30.0 ppm TWA 0.9 ppm STEL 4.5 ppm OVER 30.0 ppm 1st 0.30 ppm 2nd 0.60 ppm 3rd 1.00 ppm TWA 0.30 ppm STEL 1.00 ppm OVER 20.00 ppm 1st 25.0 ppm 2nd 50.0 ppm 3rd 300.0 ppm TWA 25.0 ppm STEL 35.0 ppm OVER 400.0ppm 1st 1.00 ppm 2nd 2.00 ppm 3rd 10.00 ppm TWA 0.50 ppm STEL 1.00 ppm OVER 20.00 ppm
Response time
T90 (*3) Range
Within 30 seconds
(Typical: 9 seconds)
Within 30 seconds
(Typical: 6 seconds)
Within 90 seconds
(Typical: 36 seconds)
Within 30 seconds
(Typical: 6 seconds)
Within 90 seconds
(Typical: 30 seconds)
Within 90 seconds
(Typical: 36 seconds)
Operating Temperature Range -40 °C - +60 °C (no sudden fluctuations)*4 -20 °C - +60 °C
(no sudden fluctuations)*4
-40 °C - +60 °C
(no sudden fluctuations)*4
-30 °C - +50 °C
(no sudden fluctuations)*4
-40 °C - +60 °C
(no sudden fluctuations)*4
Operating Humidity Range 0 - 95 %RH (no condensation)*5
Continuous Operating Time (Alkaline batteries)
(Ni-MH batteries)
Approx. 3,000 hours
Approx. 2,000 hours

*1. Standard setting: Self-latching

*2. Use dry-cell batteries listed on the Certificate to meet the explosion-proof performance.

*3. Temporary ambient conditions for approx. 15 minutes. The continuous operating ambient temperature ranges are as follows: temperature: -20 °C to +50 °C (no sudden changes)

*4. Temporary ambient conditions for approx. 15 minutes. The continuous operating ambient humidity ranges are as follows: humidity: 10 to 90 % RH (no condensatioxxn)

Accessories
  • AAA alkaline (×2) or Ni-MH (eneloop) batteries (×2) (specify at time of order)
  • Alligator Clip (×1)
  • Rubber Protection Cover (×1)
Optional Accessories
  • Belt Clip
  • Dust Filter
  • Calibration Cap
  • Data Logger Management Program

*5. This cover is non-explosion proof.

  • Heat-resistant case*5
  • Other Filters
  • Hand Strap
 
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