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 Confined-Space Oxygen Detector with LED Display Board — Underground Septic Tank Room Installation (Seoul/Gyeonggi-do)

FIX800 Confined-Space Oxygen Detector with LED Display Board — Underground Septic Tank Room Installation

This case covers a confined-space oxygen (O₂) detector installation at a building's underground septic tank room.

Pre-Installation Site Survey

A preliminary site visit is always conducted before any installation to identify electrical routing points and the optimal detector mounting location. Confirming the required waterproof conduit type and cable distances on-site enables accurate and cost-optimized installation planning.

FIX800 Detector Installation

The detector was installed first, positioned at the most suitable oxygen sampling location within the confined space.

This septic tank room had significant internal moisture. GW liquid-tight flexible conduit was used throughout to fully protect the communication wiring between the detector and LED display board from moisture and dust ingress.

LED Display Board at the Entrance

An LED display board was installed at the entrance to the septic tank room. Workers and facility managers can check the internal oxygen concentration before entering — enabling effective prevention of asphyxiation incidents and early detection of any hazardous gas presence.

Color-Coded Alarm Display — Green (Normal) / Red (Alert)

Per Korea's industrial safety guidelines, the normal oxygen concentration range is 18.5% to 23.5%.

Within normal range: display shows green LED text
Outside configured limits: display switches immediately to red LED

After installation was complete, a span gas functional test was performed under the supervision of the site manager to verify correct sensor response and alarm operation.

Frequently Asked Questions

Q1. Why is a septic tank room classified as a confined space?

Organic matter decomposition in septic tanks generates H₂S, CH₄, and CO₂ while consuming oxygen. The enclosed structure limits natural ventilation, causing oxygen levels to fall. Under Korea's OSHA, septic tank rooms are designated confined spaces — gas concentration verification before worker entry is mandatory.

Q2. Is the pre-installation site survey really necessary?

Yes, without exception. Every septic tank room differs in structure, electrical infrastructure, and moisture conditions. A site survey confirms the optimal mounting location, the correct waterproof conduit type, and the actual cable runs required — enabling a clean, complete installation in a single visit and accurate cost estimation.

Q3. Why is liquid-tight flexible conduit (GW conduit) required?

Septic tank rooms are highly humid environments. Standard conduit exposed to moisture and condensation can cause cable degradation, short circuits, and signal failures over time. GW liquid-tight conduit fully seals the communication wiring, ensuring long-term signal integrity between the detector and display board.

Q4. What should be done when the display board shows red?

Entry must be suspended immediately and ventilation equipment activated. An oxygen concentration below 18.5% indicates oxygen deficiency; above 23.5% indicates oxygen enrichment — both conditions are hazardous. Entry must not resume until the concentration has returned to the normal range and stabilized.

Q5. Why must span gas testing be performed after installation?

Installation errors in wiring or sensor positioning could prevent alarms from activating when they should. Span gas testing is the final verification step — it confirms that the sensor responds correctly to the target gas and that alarm outputs activate at the configured thresholds before the system goes into service.

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