RKI GX-Force Sample-Draw 4-Gas Monitor

Name: RKI GX-Force Sample-Draw 4-Gas Monitor – Datasheet & Quote
Brand: RKI
SKU: GX-Force

RKI smallest personal sample-draw monitor, with a leak-check mode

The RKI GX-Force is a sample-draw 4-gas monitor that RKI describes as its smallest personal 1-4 gas monitor. A strong internal pump gives a 100 ft sampling range, so the user can check a confined space, manhole or tank before entry without carrying the instrument in. It measures the standard confined-space gases (LEL combustibles, oxygen, CO and H2S) with the same micro-sensor technology used in the GX-3R, GX-3R Pro, 04 Series and Gaswatch 3.

Two operating modes cover safety monitoring (Normal) and leak investigation (Leak Check), where combustibles are read in the ppm range. The unit weighs 9.87 oz, charges and downloads over USB-C and runs about 30 hours on its lithium-ion battery.

Technical specifications

Parameter	Specification
Manufacturer / model	RKI Instruments, GX-Force sample-draw 4-gas monitor
Sampling	Internal pump, nominal 0.5 L/min with hydrophobic filter; min. 0.35 L/min open flow; 100 ft range
Combustibles (CH4 or HC)	Catalytic combustion, 0-100% LEL, 1% LEL; alarms 10, 25, 50% LEL; T90 within 30 s (CH4) or 40 s (HC)
Oxygen (O2)	Electrochemical, 0.0-40.0 vol%, 0.1 vol%; alarms 19.5, 18.0, 23.5 vol%; T90 within 20 s
Carbon monoxide (CO)	Electrochemical, 0-2,000 ppm, 1 ppm; alarms 25, 50, 1,200 ppm; TWA 25; STEL 200; T90 within 30 s
Hydrogen sulfide (H2S)	Electrochemical, 0.0-200.0 ppm, 0.1 ppm; alarms 5, 30, 100 ppm; TWA 1.0; STEL 5.0; T90 within 30 s
Alarms	Lamp, modulating buzzer (about 90 dB at 30 cm), flashing reading, vibration; latching or self-resetting; fault alarms include pump and low flow
Display	LCD (7-segment + 14-segment + icons) with automatic backlight
Data logger	3,600 items, 5-minute adjustable interval; USB 2.0 Type-C
Power	Rechargeable lithium-ion; about 30 hours (25 C, fully charged, no alarm, no backlight)
Operating conditions	-20 to +50 C (-4 to +122 F); 0-95% RH non-condensing
Protection	IP67 equivalent
Dimensions / weight	Approx. 2.52 W x 6.81 H x 1.85 D in; approx. 9.87 oz
Approvals	IECEx Ex da ia IIC T4 Ga / Ex ia IIC T4 Ga; ATEX II 1G; cQPSus Class I Div 1 Groups A-D; Class I Zone 0 AEx da ia IIC T4 Ga (with NCR-6309 sensor) / AEx ia IIC T4 Ga (without)
Manufacturer warranty	3 years material and workmanship

Using sample-draw in the field

A pump instrument must be calibrated and bump tested with the sample line attached, and a low-flow alarm warns when the hose or filter blocks. Calibration and bump-test intervals are user adjustable and can either give an alarm or lock the user out of normal measurement once a period expires. Calibration can be done individually or in a group. Sensors and filters are field replaceable.

Compared with a diffusion monitor, the GX-Force suits pre-entry checks and leak tracing along flanges and fittings; for personal continuous protection a clip-on diffusion unit such as the GX-3R Pro is the usual choice.

What to confirm before ordering

State whether CH4 or HC calibration is required for the combustible channel, the hose length and probe, the approval marking needed for the site, and calibration gas supply. The datasheet does not give a Bluetooth function for the GX-Force; data transfer is by USB-C.

Documents and quotation

The attached RKI datasheet gives the full GX-Force specification. Send the application and approval requirement for a quotation. See more fire and gas detectors.

RKI gas detection range

The range covers portable monitors such as the GX-3R Pro, GX-Force and GX-6100, fixed-system detectors and controllers, wireless gas detection and calibration equipment. Typical uses are confined-space entry, refinery and petrochemical work, water and wastewater, and leak detection, with intrinsically safe approvals on the portable models.

Ordering RKI monitors

Tell us the gases and ranges, whether diffusion or sample-draw is needed, battery type and the approval marking required on site. We check the sensor configuration and calibration gas against the manufacturer datasheet before quoting. Pump-sampling units suit pre-entry checks of tanks and manholes, while compact diffusion monitors suit personal protection.

Frequently Asked Questions