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Single Toxic Gas Monitor


SC-01 gas monitorBuilt around RKIs latest smart sensor technology, the SC-01 is a versatile single toxic gas monitor. The smart sensors are interchangeable, with the SC-01 automatically recognizing any sensor change without any set up or configuration changes. The sensors calibration information also stays with each sensor. Weighing only 7.6 ounces, it has many features which set it apart from the competition. For example, it offers sensors for Ammonia (NH3), Arsine (ASH3), Carbon Monoxide (CO), Chlorine (Cl2), Hydrogen Cyanide (HCN), Hydrogen Sulfide (H2S), Phosphine (PH3), and Sulfur Dioxide (SO2). The SC-01s unique extender cable allows the sensor to be attached to the end of a 10 foot cable for remote monitoring and quick response.


  • Smart interchangeable sensors
  • Wide range of toxic gases
  • Unique extender cable for remote monitoring
  • Compact (2.5 x 5.2 x 1.2 in.)
  • Lightweight, 7.6 ounces
  • 250 hours of continuous operation
  • Operates on 2 “AA” alkaline batteries
  • Audible / visual / vibration alarms
  • Datalogging standard
  • Impact resistant protective rubber boot
  • Intrinsically safe, CSA, C/US classified


  • Utilities
  • Personal monitoring
  • Refineries / petrochemical
  • Chemical plants
  • Hazmat response
  • Water / wastewater treatment
  • Semiconductor plants

The SC-01's large LCD display shows the gas reading, battery level, current time, and will automatically backlight in alarm conditions. Standard alarm types include vibration, visual, and audible alarms that can be set to latching or self-resetting. Controlled by a microprocessor, the SC-01 continuously checks itself for sensor connections, low battery and circuit trouble. The batteries are simple to replace, requiring no tools to access the battery compartment. One set of AA alkaline batteries provides continuous operation for over 250 hours.

The SC-01 is equipped with datalogging capability as a standard feature which communicates through an IR port with an optional Windows¨ based datalogging software program. Calibration intervals and reminders are user adjustable and can be set to either go into alarm or to lock the user out of normal measurement mode once a calibration period has expired.


Sensor Type
ESM-01 Series
Detection Principle
Response Time 60 Seconds
Sampling Method
Diffusion, optional sensor extender cable
Display Digital LCD, auto backlight during alarm
Alarm Operation Latching and reset function
Types of Alarms
    Gas alarms: 1st, 2nd, STEL, TWA and OVER
    Trouble alarms: Sensor connection, low battery, circuit trouble, and calibration error
Alarm Indication
    Gas alarms: Blinking LED array, intermittent buzzer, blinking gas values, vibration
    Trouble alarms: Blinking LED array, intermittent buzzer, display of trouble, vibration
Operating Temp.
& Humidity
-10°C to +40°C (14°F to 104°F) Below 95% RH (non-condensing)
More than 250 hours (at 25°C, no alarm)
Power 2 “AA” Alkaline dry cell batteries
Safety Rating CSA classified, “C/US”, as intrinsically safe. Class I, Division 1, Groups A, B, C, D
Dimension &
2.5” W x 5.2” H x 1.2” D (63 W x 131 H x 31 D mm) 7.6 ounces (215 g)
Case Material Dust & splash resistant. RFI shielded high impact plastic with protective rubber boot
Controls Three buttons: POWER, DISPLAY, AIR
  • Alligator clip
  • Impact resistant rubber boot
  • AA size alkaline batteries (2 each)
  • Manual
  • Belt clip
  • Datalogging software for PC
  • Extender cable 3m (10ft), straight
One year material and workmanship


Part Number Gas Range
73-0050RK-XXX = SC-01 with an alligator clip
73-0051RK-XXX = SC-01 with a belt clip
73-0050RK-NH3 Ammonia (NH3) 0 - 75 ppm
73-0050RK-ASH3 Arsine (ASH3) 0 - 1.5 ppm
73-0050RK-CO Carbon Monoxide (CO) 0 - 75 ppm
73-0050RK-CL2 Chlorine (CL2) 0 - 3.00 ppm
73-0050RK-HCN Hydrogen Cyanide (HCN) 0 - 15 ppm
73-0050RK-H2S Hydrogen Sulfide (H2S) 0 - 30.0 ppm
73-0050RK-PH3 Phosphine (PH3) 0 - 1.00 ppm
73-0050RK-SO2 Sulfur Dioxide (SO2) 0 - 6.00 ppm


Specifications subject to change without notice.