SKU: RKI01-73-0063

RKI Instruments HS-04 Series H2S Single Gas Monitor 73-0063

$118.00

Ships next business day

Description

The RKI Instruments HS-04 Series H2S Single Gas Monitor (73-0063) 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 HS-04 is ready for oil and gas, water/wastewater, and other environments where hydrogen sulfide exposure is a constant hazard.

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

Key Features:

Personal monitoring for H2S (hydrogen sulfide)
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
Field serviceable
3-year warranty on material, workmanship, and sensors

Specifications:

Gas Detected: Hydrogen Sulfide (H2S)
Detection principle: Electrochemical
Detection range: 0–2,000 ppm (1 ppm resolution)
Alarm set points: 1st: 5 ppm, 2nd: 30 ppm, 3rd: 100 ppm, TWA: 1.0 ppm, STEL: 5.0 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 10 seconds
Accuracy: 0–100 ppm: ±5% of reading or ±2 ppm H2S (whichever is greater); 101–200 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

HS-04 Manual:

04 Series Data Logger Management Program Operator's Manual:

Part Number:
73-0063

Frequently Asked Questions

What is the detection range of the RKI HS-04 hydrogen sulfide monitor?

The HS-04 (73-0063) detects H2S from 0 to 2,000 ppm with 1 ppm resolution. Default alarm set points are 5 ppm (1st alarm), 30 ppm (2nd alarm), and 100 ppm (3rd alarm), with a TWA of 1.0 ppm and STEL of 5.0 ppm. OSHA's permissible exposure limit for H2S is 50 ppm as a ceiling value; all alarm levels are user-adjustable to match your program requirements.

How fast does the HS-04 respond to hydrogen sulfide?

The HS-04's electrochemical sensor achieves T90 (90% of full-scale reading) in just 10 seconds, which is notably faster than many competing single-gas monitors. This rapid response is critical in oil and gas, wastewater, and confined space environments where H2S concentrations can spike quickly.

Can the HS-04 be used in classified hazardous locations?

Yes. The HS-04 Series is ATEX/IECEx approved and QPS classified as intrinsically safe for Class I, Division 1, Groups A, B, C, and D hazardous locations. It is appropriate for use in refineries, petrochemical plants, mining operations, and other classified areas where H2S is present.

How long does the battery last and how are sensors replaced?

The HS-04 runs up to 3,000 hours on two standard AAA alkaline batteries with no backlight — well over a year of daily 8-hour shifts. Sensors and filters are field-serviceable, meaning they can be swapped in the field without sending the instrument in for service, reducing downtime significantly.

What service and calibration support does PK Safety offer for the HS-04?

PK Safety is an RKI Factory Authorized Service Center. We stock H2S calibration gas and kit accessories compatible with the HS-04. Our team recommends bump testing before each use and scheduled calibration per your site's safety protocols. Call 800.829.9580 to order calibration supplies or arrange instrument service.