SKU: RKI01-73-0065

RKI Instruments CO-04 Series CO Single Gas Monitor 73-0065

$118.00

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Description

The RKI Instruments CO-04 Series CO Single Gas Monitor (73-0065) is a single-gas toxic personal monitor built for long service life with field-replaceable sensors and filters. With a protective rubber boot, IP-67 rating, and a 3-year warranty covering material, workmanship, and sensors, the CO-04 is ready for demanding industrial environments where carbon monoxide exposure is a daily concern.

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

Key Features:

Personal monitoring for CO (carbon monoxide)
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: Carbon Monoxide (CO)
Detection principle: Electrochemical
Detection range: 0–2,000 ppm (1 ppm resolution)
Alarm set points: 1st: 25 ppm, 2nd: 50 ppm, 3rd: 1,200 ppm, TWA: 25 ppm, STEL: 200 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: 0–500 ppm: ±5% of reading or ±5 ppm CO (whichever is greater); 510–2,000 ppm: ±20% of reading
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, 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

Brochure:

Specification Sheet:

CO-04 Manual:

Part Number:
73-0065

Frequently Asked Questions

What is the detection range of the RKI CO-04 Series carbon monoxide monitor?

The CO-04 Series (73-0065) measures carbon monoxide from 0 to 2,000 ppm with 1 ppm resolution. Default alarm set points are 25 ppm (1st alarm), 50 ppm (2nd alarm), and 1,200 ppm (3rd alarm), with TWA set at 25 ppm and STEL at 200 ppm — all adjustable to match your facility's requirements. OSHA's permissible exposure limit for CO is 50 ppm as an 8-hour TWA.

How long does the battery last in the CO-04 Series monitor?

The CO-04 Series runs for up to 3,000 hours on two standard AAA alkaline batteries under normal operating conditions (25°C, backlight off). This typically covers more than a full year of daily 8-hour shifts without replacing batteries, making the CO-04 extremely economical to operate.

Is the CO-04 Series approved for use in hazardous (classified) locations?

Yes. The CO-04 Series carries ATEX/IECEx approval and is QPS classified as intrinsically safe for Class I, Division 1, Groups A, B, C, and D environments under the C/US standard. This covers most oil and gas, petrochemical, mining, and utility hazardous-area applications.

What data logging capability does the CO-04 provide?

The CO-04 Series logs up to 300 hours of gas readings in 10-minute intervals (or 5 hours at 10-second intervals). The data log captures alarms, alarm trends, calibration history, bump test history, and instrument settings. Data is downloaded via an optional USB/IrDA adapter cable and the included data log software.

How do I service or calibrate the CO-04 Series?

PK Safety is an RKI Factory Authorized Service Center. The CO-04 Series is designed for long-term field use with replaceable sensors, filters, and rubber boots. We recommend bump testing before each shift and full calibration at regular intervals per your site's safety program. Call 800.829.9580 for calibration gas and service support.