CO, H2S, O2, or Toxic Single Gas Monitor
04 Series – Single Gas Monitors
- Continuously operate for over one year (H2S & CO)
- Toxic gases include: NH3, Cl2, HCN, NO2, PH3 & SO2
- CO with H2 elimination
- CO & O2 Dual Sensor
- Field serviceable
- Pocket size 2.1”(W) x 2.6”(H) x 0.9”(D), 2.8 ounces
- Impact, dust, and water resistant (IP-67)
- Replaceable rubber boot
- Alligator clip with 360° rotation
- Audible / visual / vibration alarms
- Automatic backlight
- Intrinsically safe, ATEX and C / US approvals
- 3 Year warranty*
The 04 Series single gas monitor is designed to operate for many years with field replaceable sensors and filters.The 04 Series can be operated continuously for up to 9,000 hours on (2) AAA size alkaline batteries (depending on model). The 04 Series has 3 preset alarms that are user adjustable. Each version is also equipped with visual, audible, and vibration alarms as standard.
The replacement sensors are inexpensive, easily field replaceable, and are interchangeable with other popular RKI instruments like the GX-3R, GX-3R Pro, and GasWatch 3. Sensors have a life expectancy of over 3 years and are backed by a 3 year warranty.*
Each 04 Series monitor is impact, dust, and water resistant with an IP-67 ingress protection rating. 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)
- Hazardous material
- Mining
- Refineries / petrochemical
- Water / wastewater treatment
- Pharmaceuticals
- Utilities
- Chemical plants
- Fire services
Gases & Detectable Ranges Gas Part #
(Model)Detection Range
(Increments)Accuracy
StatementAlarm Set Points
Continuous Operation Hydrogen Sulfide (H2S)
73-0063
HS-040 – 200.0 ppm
(0.1 ppm)± 5% of reading or ± 2 ppm H2S
A1: 5 ppm 9,000 hours A2: 30.0 ppm A3: 100.0 ppm TWA 1.0 ppm STEL 5.0 ppm Carbon Monoxide (CO) 73-0065
CO-040 – 2000 ppm (1 ppm)
± 5% of reading or ± 5 ppm CO
A1: 25 ppm 9,000 hours A2: 50 ppm A3: 1200 ppm CO (-H2) 73-0067
CO-04C± 5% of reading or ± 2 ppm CO
6,200 hours TWA 25 ppm STEL 200 ppm Oxygen (O2) 72-0018
OX-040 – 40% Vol.
(0.1%)± 0.5% O2 A1: 19.5 Vol. 3,000 hours A2: 18.0 Vol. A3: 23.5 Vol. Dual Sensor CO O2
73-0069
CX-04CO 0 – 2000 ppm
(1 ppm)
± 5% of reading or ± 2 ppm H2S
A1: 25 ppm 4,600 hours A2: 50 ppm A3: 1200 ppm TWA 25 ppm STEL 200 ppm O2 0 – 40% Vol.
(0.1%)± 0.5% O2 A1: 19.5 Vol. A2: 18.0 Vol. A3: 23.5 Vol. Ammonia (NH3)
73-0077
SC-040 – 400.0 ppm
(0.5 ppm)± 10% of reading or ± 5 % of full
scale
A1: 25.0 ppm 3,000 hours A2: 35.0 ppm A3: 300.0 ppm TWA 25.0 ppm STEL 35.0 ppm Chlorine
(Cl2)73-0075
SC-040 – 20.00 ppm
(0.05 ppm)A1: 1.0 0 ppm A2: 2.0 0 ppm A3: 10.00 ppm TWA 0.50 ppm STEL 1.00 ppm Hydrogen Cyanide (HCN)
73-0071
SC-040 – 30.0 ppm
(0.1 ppm)A1: 5.0 ppm A2: 10. 0 ppm A3: 30.0 ppm TWA 4.7 ppm STEL 10.0 ppm Nitrogen Dioxide (NO2)
73-0073
SC-040 – 20.00 ppm
(0.05 ppm)A1: 2.0 ppm A2: 4. 0 ppm A3: 20.00 ppm TWA 0.50 ppm STEL 1.00 ppm Phosphine (PH3) 73-0079
SC-040 – 20.00 ppm
(0.01 ppm)A1: 0.30 ppm A2: 0. 60 ppm A3: 1.00 ppm TWA 0.30 ppm STEL 1.00 ppm Sulfur Dioxide (SO2) 73-0081
SC-040 – 100.00 ppm
(0.05 ppm)A1: 2.0 0 ppm A2: 5.0 0 ppm A3: 100.0 ppm TWA 2.00 ppm STEL 5.00 ppm Common Specifications Sample Method Diffusion Response Time T90 in 30 seconds Alarm Types Gas alarm Trouble alarm 1st, 2nd, and 3rd
(user adjustable),
OVER alarm, STEL, and
TWASensor connection,
low battery,
circuit failure,and calibration range errorAlarm Methods Gas Alarm Trouble Alarm STEL / TWA Flashing LED’s, intermittent buzzer, flashing gas value, and vibration Flashing LED’s, intermittent buzzer, and display of error message Flashing LED’s, intermittent buzzer, flashing gas value, and vibration Datalogging 10 sec. intervals = 10 hrs. 5 min. intervals = 300hrs,
10 min. intervals = 600 hoursInstrument records alarms, alarm trends, gas readings, calibration & bump test history, instrument settings Battery Options Alkaline dry cell (2-AAA size) Display Digital LCD, gas name & concentration, auto backlighting during alarm, operation icon, battery icon Operating Temp.
& Humidity-4°F to 122°F (-20°C ~ +50℃), 0- 90% RH non condensing Dimensions 2.1” W x 2.64” H x 0.94” D (54 x 67 x 24 mm)
2.8 ounce (80g)Enclosure Dust and water resistant with IP-67 rating Safety Rating ATEX/IECEx approved. QPS classified, “C / US”, as intrinsically safe, Class I, Division 1, Groups A, B, C, D Standard
Accessories• Rubber boot • Datalogging software
• Alligator clip • Alkaline batteriesOptional
Accessories• Calibration cap • Wrist strap
• Calibration kit
• Belt clip
• Datalogging download cable
Special Functions Manual backlight for LCD (automatically lit during alarm), Peak hold, STEL & TWA Warranty 3 year warranty (1 year for Ammonia and Chlorine) 04 Series Software
Setup Program
(version 06258)Datalogging
(version 06134)04 Series User Setup Program Operator’s Manual
04 Series Data Logger Management Program Operator’s Manual
04 Series Datasheet & Manuals
04-Series Product Datatsheet SC-04 Operator’s Manual CO-04 Operator’s Manual CX-04 Operator’s Manual HS-04 Operator’s Manual CO-04C Operator’s Manual OX-04 Operator’s Manual IrDA Cable Driver Installation Guide