Testo 300 instrument auction prices

As of 6 November 2026, hammerhistory.com has recorded 5 auction sales of the Testo 300 instrument with a published hammer price, closed between 5 October 2026 and 3 November 2026, on 5 auction sites in 3 countries. One sale is free to read: a Testo 300 instrument sold for EUR 110 on 5 October 2026. 1 is at auction now.

Known on 5 auction sites 5 sold with a price 1 at auction now 10 seen at auction

3 hammer prices are locked. See what every Testo 300 really sold for and know a fair price before you bid. Pay once, open at once, new sales included for a year.

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All sales 5

Sold	Built	Hours	Auction house	Place	Photos	Hammer price
2026-10-05 Analyseur de combustion TESTO 300.	unknown	unknown	interencheres.com	Châlons-en-Champagne, FR	1	EUR 110 FREE
2026-11-03 Abgasanalysegerät Testo 300 M, defekt	unknown	unknown	aurena.de	Kärntner Straße, 8, 8700, Leoben, AT, AT	4	EUR 1 FREE
2026-10-22 1 analyseur de combustion complet TESTO 300	unknown	unknown	Auction house	FR	1	in the report
2026-10-11 Testo 300 Set 1 Flue Gas Analyzer Incl. Accessories In Case	unknown	unknown	Auction house	NL	7	in the report
2026-10-05 Analyseur de combustion TESTO 300.	unknown	unknown	Auction house	FR	1	in the report

Click a sale to see that instrument with its photos and details. 4 more closed without a sale. A hammer price under EUR 100 is free to read.

At auction now 1

Abgasmessgerät Testo 300 XL

aurena.de · Kärntnerstraße, 8, 8700, Leoben, AT

EUR 1 startcloses 2026-11-17

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Testo 300

Laboratory equipment

The Testo 300 is a flue gas and combustion analyser used by heating engineers and technicians to measure emissions and efficiency of boilers, furnaces and other combustion appliances. It is a handheld instrument with a probe for sampling flue gas, displaying readings such as oxygen, carbon monoxide, draught and efficiency. It sits in Testo's professional combustion analyser range, available in variants such as M and XL with different sensor and printer options.

Replaced

Testo 330

We recognise this model across the auction sites and keep every one we see together.

On a used one

Check the condition and remaining life of the internal gas sensors, as these are consumables that degrade and are costly to replace. Confirm the probe, filters and printer (if fitted) are complete and functioning, and ask about the calibration history.

About Testo

Testo is a German manufacturer specialising in measurement technology, producing devices for temperature, humidity, pressure and gas analysis used in laboratories, HVAC, food safety and industrial applications. It is known for portable measuring instruments and monitoring systems such as the Saveris data logging range. The company remains a family owned business headquartered in Germany.

Founded 1957 · Lenzkirch, Germany

All Testo models

5sold with a price

1at auction now

5auction sites

3countries

3 more hammer pricesin the report · EUR 9 once

sold, price lockedfree to read

Questions about Testo 300 auction prices

How many Testo 300 auction sales are on record?

5 sales with a published hammer price, closed between 5 October 2026 and 3 November 2026, on 5 auction sites in 3 countries. 4 more closed without a sale.

Is a Testo 300 at auction now?

1 instrument of this model is at auction now; they are listed on this page with their current bid and when they close.

Are the Testo 300 hammer prices free to read?

The oldest sale of every model is free to read, and so is every hammer price under the site's floor. The other 3 hammer prices of the Testo 300 open with an account: every sale of the model for a year, or one sale on its own.

Hammer prices are what the auction house recorded when the lot closed, before the buyer's premium, in the currency of the sale. A sale listed on a house's own site and on its platform counts once. Doubt a figure? Open the sale and its listing is linked there. How prices are recorded.