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SKU: RKI01-73-0081

RKI Instruments SC-04 Series SO2 Single Gas Monitor 73-0081

$606.67

Ships in 3 - 5 days

Description

The RKI Instruments SC-04 Series SO2 Single Gas Monitor (73-0081) is a single-gas toxic personal monitor designed for long service life with field-replaceable sensors and filters. With a protective rubber boot and an IP-67 rating, the SC-04 Series with a 3-year warranty is built for industries where sulfur dioxide exposure — from chemical processing, combustion, or pulp and paper operations — requires continuous personal monitoring.

Applications: Hazardous material response, Mining, Refineries/petrochemical, Water/wastewater treatment, Pharmaceuticals, Utilities, Chemical plants, Fire services

Key Features:

Personal monitoring for SO2 (sulfur dioxide)
Operates 3,000 hours on replaceable alkaline batteries (2-AAA)
Digital LCD readout
Easy one-button Power Mode on/off
Pocket size: 2.1"(W) x 2.6"(H) x 0.9"(D)
Lightweight: 2.8 ounces
Impact, dust, and water resistant (IP-67)
Replaceable rubber boot
Alligator clip with 360° rotation
Data log: 10 to 600 hours with adjustable intervals
Audible / visual / vibration alarms
Automatic backlight
Low battery alarm
Intrinsically safe, ATEX and C/US approvals
3-year warranty on material, workmanship, and sensors

Specifications:

Gas Detected: Sulfur Dioxide (SO2)
Detection principle: Electrochemical
Detection range: 0–100.0 ppm (0.05 ppm resolution)
Alarm set points: 1st: 2.00 ppm, 2nd: 5.00 ppm, 3rd: 100.00 ppm, TWA: 2.00 ppm, STEL: 5.00 ppm
Alarm types: 1st, 2nd, 3rd (user adjustable), OVER alarm, STEL, TWA; Trouble alarms: sensor connection, low battery, circuit failure, calibration range error
Gas sampling: Diffusion
Response time: T90 in 30 seconds
Accuracy: ±10% of reading or ±5% of full scale
Data logging: 10-sec intervals = 5 hr; 5-min intervals = 150 hr; 10-min intervals = 300 hr. Records alarms, alarm trends, gas readings, calibration & bump test history, instrument information and settings
Continuous operation: 3,000 hours on alkaline dry cell (at 25°C, no backlight)
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, IP-67
Display: Digital LCD readout, gas name & concentration, auto backlight during alarm, operation icon, battery icon

Monitor Includes:

Rubber protective boot
Alkaline batteries (2-AAA size)
Alligator clip
Data log software

Optional Accessory: Downloading cable, USB / IrDA adapter

Specification Sheet:

Part Number:
73-0081

Frequently Asked Questions

Where is SO2 monitoring most commonly required?

Sulfur dioxide is a byproduct of combustion processes involving sulfur-containing fuels, and is generated in chemical plants, smelters, pulp and paper mills, power generation facilities, and refineries. It is also present in volcanic activity and agricultural fumigation applications. OSHA's permissible exposure limit for SO2 is within 5 ppm as a ceiling value; the SC-04's STEL alarm is factory-set at 5 ppm and is user-adjustable to match your program.

How does the SC-04 SO2 monitor differ from the ESR-A13D-SO2 sensor?

The SC-04 (73-0081) is a portable personal monitor worn by the worker, providing personal exposure tracking with audible, visual, and vibration alarms. The ESR-A13D-SO2 is a replacement sensor module for fixed-system transmitters. Both are designed for SO2 detection, but serve different points in your gas detection program — the SC-04 protects the individual, while fixed sensors protect the area.

Can the SC-04 Series SO2 monitor operate in cold or harsh outdoor environments?

The SC-04 is rated IP-67 for dust and water resistance and its electrochemical sensor operates within standard industrial temperature ranges. For extreme cold or heat, consult the operator manual for operating limits. The rubber boot provides additional mechanical protection in rough field conditions.

How are alarm set points configured on the SC-04 SO2 monitor?

Factory default alarm set points are 2.00 ppm (1st), 5.00 ppm (2nd), and 100.00 ppm (3rd), with TWA at 2.00 ppm and STEL at 5.00 ppm. All set points are user-adjustable via the optional 04 Series User Setup Program software, allowing safety managers to tailor alarms to specific regulatory or site requirements.

What calibration support does PK Safety provide for the SC-04 SO2 monitor?

PK Safety is an RKI Factory Authorized Service Center. We stock SO2 calibration gas cylinders and accessories compatible with the SC-04 Series. Our team recommends bump testing before every shift and full calibration at regular intervals per your safety management system. Call 800.829.9580 to discuss calibration gas options or instrument service.