BGT | PORTABLE GAS TESTER | BUCHHOLZ

BGT | PORTABLE GAS TESTER | BUCHHOLZ

Buchholz Gas Tester (BGT) is a portable onsite diagnostic tool for transformers equipped with Buchholz relays. It analyzes accumulated gas samples to distinguish between fault gases and air ingress. The BGT 4.1 measures hydrogen concentration for quick fault detection, while the BGT 4.2 provides multi gas analysis (H2, CO2, CO, hydrocarbons, ethyne) for deeper fault cause identification. Both models include a Buchholz Gas Sampler (BGS) for reliable sample collection.

About the product


Buchholz gas tester BGT

If there is a gas accumulation in the Buchholz relay, it is advisable to take a sample of the gas immediately!
The free gas in the Buchholz relay and the transformer oil are in close contact. Therefore some gas constituents will dissolve in the oil, modifying the composition of the gas collected. Typical fault gas patterns will disappear.

Due to the analysis can be distinguished, if the incident was caused by a serious fault in the transformer or has been occured due to air accumulation in the Buchholz relay.

Buchholz gas tester BGT 4.1


The BGT 4.1 is used to measure the hydrogen concentration in the Buchholz gas. To make a decision „Fault gas or Air" the measurement of the hydrogen concentration in the Buchholz gas is enough. Any kind of fault in the oil causes the formation of hydrogen.
The gas to be measured is sampled by the Buchholz gas sampler BGS and fed into the BGT 4.1. A BGS is included in the scope of supply.

Buchholz gas tester BGT 4.2


The BGT 4.2 allows the measurement of hydrogen, carbon dioxide, carbon monoxide, total hydrocarbon and ethyne concentrations in the Buchholz gas. The determination of the various fault gases allows to draw conclusions from the different causes of fault.
The gas to be measured is sampled by the Buchholz gas sampler BGS and fed into the BGT 4.2. A BGS is included in the scope of supply



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