Single Toxic Gas Monitor


  • 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


Built 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


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


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