Which Rapidox for O₂ monitoring in a transformer?

For a fixed cabinet — Rapidox 2100 with remote zirconia sensor or OEM 2100-RSB; for field purge — Rapidox 5100 Purge Gas; for the lab — Rapidox 1100.

How does Rapidox 2100 differ from 1100?

2100 is for in-process measurements up to 650°C with a sensor on a cable up to 25 m; 1100 is for pumped sampling in lab and chamber conditions up to 50°C.

Where are SF6 analyzers listed?

SF6 analyzers are in a separate “SF6 gas analyzers” section to avoid duplicate catalog pages. Oxygen and multigas instruments stay here.

Is training and service available in Kazakhstan?

Yes — commissioning, calibration, staff training and technical support across Kazakhstan.

Oxygen and multigas analyzers

Oxygen and specialty gas analyzers for transformers, nitrogen purge, power plants, hydrogen, multigas diagnostics and modified atmosphere packaging (MAP).

KEG TRK supplies, commissions and services instruments for energy companies and industrial sites in Kazakhstan. The Rapidox line is manufactured by Cambridge Sensotec (UK).

Oxygen and inert atmospheres

Rapidox 1100/2100 — from ppm O₂ in transformer nitrogen purge to high-temperature process monitoring at power plants.

Power plants, hydrogen, multigas

Rapidox 3100/5100/7100 — CO, CO₂, CH₄, H₂ and syngas for boilers, biogas and hydrogen energy projects.

SF6 gas analyzers

SF6, Clean Air and alternative gas quality control for GIS and switchgear — in a dedicated SF6 analyzer catalog.

Go to SF6 gas analyzers →

Rapidox 1100 — oxygen & specialty gases

8 models in group

RX1100-Z

Rapidox 1100 — oxygen analyser

Versatile O₂ analyser with zirconia, electrochemical or optical sensor for ppm and percent measurements

Cambridge Sensotec

RX1100-OPT-MAX

Rapidox 1100 OPT-MAX — full-range O₂

Dual-sensor analyser: optical for high % and electrochemical for ppm — continuous 0.1 ppm to 100%

Cambridge Sensotec

RX1100-H

Rapidox 1100-H — hydrogen analyser

Thermal conductivity H₂ analyser for industrial and energy gas mixtures

Cambridge Sensotec

RX1100-CO

Rapidox 1100 — carbon monoxide analyser

Electrochemical CO analyser for combustion control and safety in energy plants

Cambridge Sensotec

RX1100-CO2

Rapidox 1100 — carbon dioxide analyser

NDIR CO₂ analyser for process and emissions monitoring

Cambridge Sensotec

RX1100-He

Rapidox 1100 — helium analyser

Thermal conductivity helium analyser for leak and purity monitoring

Cambridge Sensotec

RX1100-CH4

Rapidox 1100 — methane analyser

NDIR methane analyser for biogas, natural gas and safety

Cambridge Sensotec

RX1100Z-OEM-RSB

Rapidox 1100Z-OEM-RSB / 1100ZR3-OEM-RSB

Miniature 24 V DIN-rail OEM oxygen analyser with pump for switchgear and GIS cabinets

Cambridge Sensotec

Rapidox 2100 — in-process oxygen

7 models in group

RX2100-Z

Rapidox 2100 — in-process oxygen analyser

Zirconia O₂ analyser with remote sensor to 650°C and Type K thermocouple for transformers and furnaces

Cambridge Sensotec

RX2100-FGA

Rapidox 2100 FGA — forming gas analyser

Specialised 2100 for N₂/H₂ forming gas in heat treatment and energy

Cambridge Sensotec

RX2100-OEM-RSB

Rapidox 2100-OEM-RSB

Compact 24 V OEM zirconia O₂ module for transformer monitoring systems

Cambridge Sensotec

RX2100-OEM-RSB-WALL

Rapidox 2100-OEM-RSB — wall mount

Wall-mount OEM 2100 for fixed O₂ monitoring at energy sites

Cambridge Sensotec

RX2100-OEM-INS/ENC

Rapidox 2100-OEM-RSB INS / ENC

OEM 2100 panel insert (INS) and enclosed (ENC) configs for automation cabinets

Cambridge Sensotec

RX2100-OEM-SIL2

Rapidox 2100-OEM-SIL2

SIL 2 certified OEM oxygen analyser for critical energy safety systems

Cambridge Sensotec

RX2112

Rapidox 2112 — 15-channel O₂ multiplex

Multiplexer for up to 15 oxygen sample points on large transformers, furnaces and GIS

Cambridge Sensotec

Rapidox 3100 — bench multigas

2 models in group

RX3100

Rapidox 3100 — bench multigas analyser

Bench multichannel analyser for O₂, CO₂, CO, H₂ and more — labs and power plants

Cambridge Sensotec

RX3100-OEM-3

Rapidox 3100-OEM-3

OEM multigas module for test and monitoring equipment integration

Cambridge Sensotec

Rapidox 5100 — portable multigas

4 models in group

RX5100

Rapidox 5100 — portable multigas analyser

Portable O₂, CO, CO₂, CH₄ analyser in rugged case for field diagnostics

Cambridge Sensotec

RX5100-BIO

Rapidox 5100 — portable biogas analyser

Portable CH₄, CO₂, O₂, H₂S for biogas plants at CHP and cogeneration sites

Cambridge Sensotec

RX5100-SYN

Rapidox 5100 — portable syngas analyser

Portable syngas (CO, H₂, CH₄, CO₂) for gasification and energy projects

Cambridge Sensotec

RX5100-PURGE

Rapidox 5100 — purge gas analyser

Portable O₂ and dew point for transformer, GIS and cable purging

Cambridge Sensotec

Rapidox 7100 — hydrogen multigas

3 models in group

RX7100

Rapidox 7100 — multigas analyser

High-precision bench analyser for hydrogen and process gas mixtures

Cambridge Sensotec

RX7100-BLUE

Rapidox 7100 Blue Hydrogen analyser

7100 configuration for natural-gas-derived blue hydrogen at energy sites

Cambridge Sensotec

RX7100-GREEN

Rapidox 7100 Green Hydrogen analyser

7100 configuration for electrolytic green hydrogen and H₂/O₂ purity at energy sites

Cambridge Sensotec

MAP & modified atmosphere packaging

1 models in group

RX1100-AM-MAP

Rapidox 1100 AM MAP — modified atmosphere packaging analyser

Fixed O₂/CO₂ analyser for modified atmosphere packaging (MAP) on food packaging lines — IP54 stainless steel enclosure

Cambridge Sensotec

Power and energy applications

• Power and distribution transformers — O₂, N₂, purge
• Switchgear and circuit breakers
• Gas-insulated lines and GIS chambers
• CHP, thermal power plants, boilers and turbines
• Nitrogen plants and inert gas storage
• MAP and gas control in food packaging

Articles: transformers, DGA and oxygen in oil

Oxygen in Transformer Headspace: Rapidox 1100 Field Monitoring →Rapidox 3100 as a DGA Laboratory Companion: Headspace Before Chromatography →Nitrogen Blanket on CHP Auxiliary Transformers: Continuous Rapidox 2100 Monitoring →Field Gas Screening Before Laboratory DGA on Transformers →Conservator and Oxygen: CHP Oil Diagnostics Without Opening the Tank →Oxygen Depletion in Enclosed MV Switchgear: O₂ and SF₆ Monitoring at CHP Substations →Clean Air and Oxygen in SF₆-Free Switchgear: Monitoring at CHP During the SF₆ Transition →Vibration Monitoring of Power Transformer Cooling Auxiliaries at CHP Plants →Transformer DGA at CHP: What to Add Beyond Oil Chromatography →Integrated Monitoring of CHP Transformer Bays: Rapidox, Vibration and Ultrasound →

All articles →

Frequently asked questions about Rapidox

Select an oxygen analyzer for your site

Specify equipment type (transformer, GIS, power plant, switchgear) — we will recommend configuration and scope.

Call Request a quote About Cambridge Sensotec →

25 oxygen and multigas analyzers in the catalog