What does WANDI Korea do?

WANDI Korea is the official Korean distributor of WANDI environmental and gas measurement instruments, operated by RS Korea Co., Ltd. We provide sales, calibration, repair, installation, and technical support for portable and fixed multi-gas detectors and air quality monitoring systems, exporting to more than 20 countries with over 5,000 delivery records.

What products do you offer?

We supply portable multi-gas detectors (EDW100, EDW500, Gas Tiger series), fixed multi-gas detectors (FIX800, FIX900, FIX-AP), air quality monitoring systems (FIX5000), and gas leak detectors (GLD series) for industrial safety and environmental measurement.

Which gases can be measured?

Our instruments measure oxygen (O2), carbon monoxide (CO), hydrogen sulfide (H2S), combustible gases (EX), carbon dioxide (CO2), ammonia (NH3), and volatile organic compounds (VOC), among other hazardous and combustible gases found on industrial sites.

Do you provide calibration and repair services?

Yes. Beyond product sales, WANDI Korea provides in-house and national certified calibration, repair, installation, and ongoing technical support. Calibration and repair requests can be submitted through the quote/calibration/repair pages on our website.

How can I get a quote for a gas detector?

You can request a quote directly through the quote page on our website or through a nearby dealer. Let us know your application and target gases, and we will recommend a suitable model.

In which fields are the products used?

They are used across a wide range of industrial sites including laboratories, factories and plants, hospitals, military facilities, livestock and wastewater treatment, and construction sites for worker safety and environmental monitoring.

FIX800-H₂ Fixed Hydrogen Gas Detector Installation — 40,000 ppm LEL Configuration

FIX800-H₂ Fixed Hydrogen Gas Detector — 40,000 ppm LEL Configuration

This article presents a delivery case for the FIX800-H2-40,000 ppm fixed hydrogen (H₂) gas detector.

Understanding Hydrogen LEL

Flammable gases have different lower explosive limit (LEL) ranges depending on composition. Hydrogen has an LEL range of 40,000 ppm (= 4% vol). Standard flammable gas sensors use methane as the reference gas, with the following spans:

Methane (CH₄): 0–5% vol = 0–100% LEL
Hydrogen (H₂): 0–4% vol = 0–100% LEL

Comparison of LEL ranges by gas type

FIX800-H2-40,000 ppm — Product Overview

The FIX800-H2-40,000 ppm is a fixed detector configured to measure hydrogen across its full LEL range. It is suited for permanent installation at hydrogen storage, piping, and production areas where continuous leak detection is required.

Options and Installation Components

Pump adapter accessory (optional) — Enables convenient hose/tube connection for drawing gas from hard-to-reach locations. Attached to the base of the sensing section.

Product label — Indicates installed gas sensor type and measurement range

Cable entry — 3/4 NPT fitting

Wall-mount housing

Frequently Asked Questions

Q1. Can a standard LEL (flammable gas) sensor be used for hydrogen detection?

Standard LEL sensors are calibrated against methane and are not accurate for hydrogen. Because hydrogen has a different LEL span (0–40,000 ppm) compared to methane, a hydrogen-specific sensor is required for reliable measurement. The FIX800-H2 model is configured with a dedicated H₂ sensor for this purpose.

Q2. What is the measurement range of the FIX800-H2?

The FIX800-H2 measures 0–40,000 ppm (0–4% vol, 0–100% LEL), covering the full lower explosive limit range of hydrogen gas.

Q3. Is gas detector installation legally required at hydrogen-handling facilities?

Under Korea's Occupational Safety and Health Act and the High-Pressure Gas Safety Control Act, gas leak detection systems are recommended — and mandatory at facilities above a certain scale — wherever hydrogen is used. Explosion-proof certified equipment is required in classified hazardous areas.

Q4. When is the wall-mount housing or pump adapter needed?

The wall-mount housing is used for permanent fixed installation. The pump adapter is used when a hose must be run to a specific sampling point — for example, near piping in confined or hard-to-access locations where the detector body cannot be mounted directly at the leak source.

Q5. What does the 3/4 NPT cable entry mean?

3/4 NPT is a North American standard pipe thread specification used for conduit connections. When installed in classified hazardous areas, this fitting accepts explosion-proof conduit fittings that comply with electrical safety requirements.

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