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SKU: RKI01-73-0079

RKI Instruments SC-04 Series PH3 Single Gas Monitor 73-0079

$606.67

Ships in 3 - 4 days

Description

The RKI Instruments SC-04 Series PH3 Single Gas Monitor (73-0079) 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 semiconductor facilities, agricultural operations, and chemical plants where phosphine exposure at sub-ppm concentrations demands precise, reliable detection.

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

Key Features:

Personal monitoring for PH3 (phosphine)
Operates 3,000 hours on replaceable alkaline batteries (2-AAA)
Digital LCD readout with 0.01 ppm resolution
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
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: Phosphine (PH3)
Detection principle: Electrochemical
Detection range: 0–20.00 ppm (0.01 ppm resolution)
Alarm set points: 1st: 0.30 ppm, 2nd: 0.60 ppm, 3rd: 0.60 ppm, TWA: 0.30 ppm, STEL: 1.00 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, gas name & concentration, auto backlight during alarm, operation icon, battery icon

Monitor Includes:

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

Optional Accessory: Downloading cable, USB / IrDA adapter

04 Series User Setup Program Operator's Manual:

04 Series Data Logger Management Program Operator's Manual:

Part Number:
73-0079

Frequently Asked Questions

What industries use phosphine monitors and where is PH3 exposure a risk?

Phosphine is primarily encountered in semiconductor manufacturing (as a dopant gas), grain storage and fumigation, chemical production, and some metal refining operations. It is also released during the decomposition of organic phosphides. OSHA's permissible exposure limit for PH3 is within 0.3 ppm as an 8-hour TWA; the SC-04's default TWA alarm is set at this compliance threshold and is user-adjustable.

Why does the SC-04 PH3 monitor have such a low detection resolution?

Phosphine is acutely toxic at very low concentrations — OSHA's TWA is 0.3 ppm, and ACGIH's TLV-TWA is 0.05 ppm. The SC-04's 0.01 ppm resolution ensures workers receive meaningful early warnings at the sub-ppm levels where phosphine exposure becomes hazardous, well before concentrations reach immediately dangerous levels.

Is the SC-04 PH3 monitor intrinsically safe for classified locations?

Yes. The SC-04 Series is ATEX/IECEx certified and QPS classified as intrinsically safe for Class I, Division 1, Groups A, B, C, and D locations. The IP-67 enclosure adds protection against dust and water in process environments where both chemical and physical hazards coexist.

How is the SC-04 PH3 monitor calibrated?

Calibration requires a certified phosphine calibration gas at a known concentration within the monitor's range. The instrument is calibrated using the demand-flow regulator and calibration adapter supplied as optional accessories. We recommend bump testing before each use and full calibration at intervals specified by your safety management program. The optional downloading cable and 04 Series User Setup Program software allow you to adjust alarm set points and review calibration history.

Can PK Safety service the SC-04 PH3 monitor?

Yes. PK Safety is an RKI Factory Authorized Service Center. We can assist with phosphine calibration gas procurement, sensor replacement, and instrument servicing. Call 800.829.9580 for service inquiries or calibration support for this specialty toxic gas monitor.