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 Statement	Alarm   Set Points	Continuous Operation
Hydrogen Sulfide   (H2S)	73-0063 HS-04	0 – 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-04	0 – 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-04	0 – 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-04	CO   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-04	0 – 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-04	0 – 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-04	0 – 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-04	0 – 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-04	0 – 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-04	0 – 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 TWA	Sensor connection, low battery, circuit failure,and calibration range error
Alarm 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 hours
Instrument 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 batteries
Optional 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