04 Series

The 04 Series toxic single gas monitor is designed to operate for many years with field replaceable sensors and filters.

The HCN, NO2, PH3, and SO2 versions can be operated continuously for at least 3,000 hours on (2) AAA size alkaline batteries. The 04 models have 2 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 backed by a 3 year warranty.

Each 04 Series monitor is impact, dust, and water resistant with an IP-67 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.

Model Name	SC-04 HCN	SC-04 NO2	SC-04 PH3	SC-04 SO2	CO-04 (-H2)	CX-04
Gas Detected	Hydrogen Cyanide	Nitrogen Dioxide	Phosphine	Sulfur Dioxide	Carbon Monoxide	CO	O2
Detection Principle	Electrochemical
Part#	73-0071	73-0073	73-0079	73-0083	73-0067	73-0069
Detection Range (Increments)	0 ~ 30.0 ppm (0.1 ppm)	0 ~ 20.00 ppm (0.05 ppm)	0 ~ 20.00 ppm (0.01 ppm)	0 ~ 100.0 ppm (0.05 ppm)	0 ~ 2000 ppm (1 ppm)		0 ~ 40% (0.1%)
Alarm Set Points	1st: 5.0 ppm 2nd: 10.0 ppm 3rd: 30.0 ppm TWA: 4.7 ppm STEL: 10 ppm	1st: 2.00 ppm 2nd: b4.00 ppm 3rd: 20.00 ppm TWA: 0.50 ppm STEL: 1.00 ppm	1st: 0.30 ppm 2nd: 0.60 ppm 3rd: 0.60 ppm TWA: 0.30 ppm STEL: 1.00 ppm	1st: 2.00 ppm 2nd: 5.00 ppm 3rd: 100.00 ppm TWA: 2.00 ppm STEL 5.00 ppm	1st 25 ppm 2nd 50 ppm 3rd 1200 ppm TWA 25 ppm STEL 200 ppm		L: 19.5 % LL: 18.0% H: 25.0 %
Alarm Types	Gas alarms: 1st, 2nd and 3rd (user adjustable), OVER alarm, STEL and TWA Trouble alarms: Sensor connection, low battery, circuit failure, and calibration range error
Alarm Methods	Gas alarm: Flashing LED’s, intermittent buzzer, flashing gas value, and vibration Trouble alarm: Flashing LED’s, intermittent buzzer, and display of error message STEL & TWA alarms: Flashing LED’s, intermittent buzzer, flashing gas value, and vibration
Gas Sampling	Diffusion
Response Time	T90 in 30 seconds
Accuracy (which ever is greater)	± 10% of reading or ± 5 % of full scale				< 300 ppm ± 5 % of reading > 300 ppm ± 20 % of reading		< 25% ± 0.5 % > 25% ± 3.0 %
Data Logging	10 second intervals = 10 hours, 5 minute intervals = 300 hours, 10 minute intervals = 600 hours
	Instrument records alarms, alarm trends, gas readings, calibration & bump test history, instrument information and settings.
Battery Options	Alkaline dry cell (2-AAA size)
Continuous Operation	3,000 hours (at 25°C, no backlight)				6,200 hours	4,600 hours
Safety Rating	ATEX/IECEx approved. QPS classified, “C / US”, as intrinsically safe, Class I, Division 1, Groups A, B, C, D
Enclosure	Dust and water resistant with IP-67 rating
Dimensions & Weight	2.1” W x 2.64” H x 0.94” D, (54 x 67 x 24 mm); 2.8 ounces (80 g)
Display	Digital LCD, gas name & concentration, auto backlighting during alarm, operation icon, battery icon
Operating Temp. & Humidity	-4°F ~ 122°F (-20°C ~ 50°C); Humidity below 90% RH (non-condensing)
Standard Accessories	• Rubber protective boot • Alligator clip • Data logging software • Alkaline batteries
Optional Accessories	• Calibration cap • Wrist strap • Calibration kit • Belt clip • Data logging download cable
Special Functions	• Manual backlight for LCD (automatically lit during alarm) • Peak hold, STEL & TWA
Warranty	3 Year warranty