RIKEN KEIKI gas detectors

Technical selection of RIKEN KEIKI gas detectors: portable GX-3R, GX-9000, GX-6100, SC-9000, fixed GD-A80, GD-81D, GD-70D heads, SD-1 smart transmitters and FI-900 analyzers.

Personal gas monitors GX-3R

The GX-3R monitors four gases: combustibles up to 100% LEL, oxygen up to 40 vol%, CO up to 2,000 ppm and H2S up to 200 ppm. It weighs about 100 g, is rated IP66/68 and sounds a 95 dB alarm at 30 cm. The battery lasts about 40 hours in long battery mode.

Four gases: LEL, O2, CO, H2S
Weight about 100 g
IP66/68 enclosure
Operates from −40 to +60 °C

Portable multi-gas detectors GX-9000

The GX-9000 detects up to six gases at once with new ceramic catalytic, thermal conductivity, NDIR, electrochemical and PID sensors. The IP66/68 housing survives a 1.5 m drop and has Bluetooth. The BUL-9000 lithium-ion unit runs about 25 hours.

Up to six gases at once
IP66/68, 1.5 m drop
BUL-9000 battery: about 25 h
Weight about 1.1 kg

Six-gas detectors GX-6100 with PID

The GX-6100 detects up to six gases and can carry a PID sensor for low-level VOC detection. Besides gas and fault alarms it provides panic and man-down alarms and shares emergency alerts via Bluetooth. The BUL-6100 lithium-ion unit runs about 28 hours.

Up to six gases with PID
Panic and man-down alarms
IP67 enclosure
Weight about 500 g

Toxic gas detectors SC-9000

The SC-9000 detects up to three toxic gases at once with potentiostatic electrolysis sensors, covering NH3, Cl2, HF, SiH4, PH3 and other gases. It is intrinsically safe (Ex ia) and rated IP66/68. The lithium-ion battery unit runs about 60 hours.

Up to three toxic gases
Potentiostatic electrolysis sensors
Intrinsically safe Ex ia IIC T4
Battery: about 60 hours

Flameproof gas detector heads GD-A80

GD-A80 fixed heads in an Ex db IIC T4 flameproof enclosure cover ranges from ppm to %LEL. Versions: GD-A80 with catalytic sensors, GD-A80V semiconductor, GD-A80S hot-wire semiconductor and GD-A80N thermal conductivity; GD-A80-70 works up to 70 °C.

Ex db IIC T4 Gb enclosure
Range from ppm to %LEL
Operates from −20 to +53 °C
GD-A80-70 up to 70 °C

Smart transmitters SD-1 and SD-1D

SD-1 (diffusion) and SD-1D (suction) detect combustible gases with catalytic and new ceramic sensors. TYPE GP covers 0–100% LEL with a 25% LEL alarm setpoint. The Ex db IIC T5 flameproof enclosure suits acetylene and hydrogen, and a microprocessor runs self-diagnosis.

Range 0–100% LEL
Alarm setpoint 25% LEL
IP65 enclosure
24 VDC power supply

Suction gas detector heads GD-81D and GD-70D

GD-81D and GD-70D suction heads monitor toxic gases, combustibles and oxygen in semiconductor and LCD plants. GD-81D detects up to two components, accepts the same U sensor units as earlier models and runs on 24 V DC or PoE with web browser access.

GD-81D: up to two gases
24 V DC or PoE power
Pump vibration about 1/20
GD-70D weight about 0.9 kg

Gas analyzers FI-900 and CO2 detectors RI-600

The FI-900 interferometer gas analyzer monitors VOC and hydrogen concentrations in a flameproof enclosure with self-diagnosis and MODBUS status checks. The fixed RI-600 measures CO2 with an NDIR sensor in ranges from 0–2,000 ppm to 0–5 vol%.

FI-900 interferometer method
FI-900 MODBUS communication
RI-600 NDIR CO2 sensor
RI-600 range up to 5 vol%

Choosing a RIKEN KEIKI sensor principle for the target gas

RIKEN KEIKI develops in house the sensors used in its gas detectors. Combustible gases are measured by catalytic combustion and new ceramic catalytic sensors, high vol% concentrations by thermal conductivity, toxic gases by potentiostatic electrolysis and oxygen by a galvanic cell.

NDIR sensors handle combustible gases and CO2, PID sensors detect low-level VOC, and the interferometer method is used in the FI-900 analyzer for VOC and hydrogen.

Portable and fixed gas detectors

The GX-3R, at about 100 g, covers personal four-gas monitoring; the GX-9000 detects up to six gases and the GX-6100 adds a PID sensor; the SC-9000 covers up to three toxic gases at once.

Fixed systems combine GD-A80 flameproof heads and SD-1 smart transmitters for combustible gases, while semiconductor and LCD plants use GD-81D and GD-70D suction heads.

Integration and maintenance of fixed systems

GD-81D is available with a 4–20 mA output and 24 V DC supply or with Ethernet and PoE power; device information is available through a web browser. FI-900 reports concentrations and status via MODBUS.

The manufacturer recommends monthly alarm circuit tests and regular inspections with span adjustment once every six months; suction heads also need flow, filter and pump checks.

RIKEN KEIKI and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of RIKEN KEIKI and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.