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No battery, no display to fail, one dial to read

TFA Dostmann Analog Thermometer Hygrometer 45.2024

A mechanical, battery-free analog thermometer and hygrometer from TFA Dostmann, with colour-coded comfort-zone markings on the dial. Confirmed with a live offer and 7+ sellers on Amazon.de; we found the same listing on Amazon.fr but did not confirm a live offer there at the time of checking.

TFA Dostmann analog dial thermometer-hygrometer with metal ring

TFA Dostmann Analog Thermometer Hygrometer 45.2024

A mechanical, battery-free analog thermometer and hygrometer from TFA Dostmann, with colour-coded comfort-zone markings on the dial. Confirmed with a live offer and 7+ sellers on Amazon.de; we found the same listing on Amazon.fr but did not confirm a live offer there at the time of checking.

Measures
Indoor temperature and relative humidity
Mechanism
Analog dial, no battery required
Display
Colour-coded comfort zones marked directly on the dial
EAN
4009816020284
  • No battery to replace, ever — a genuine advantage over both digital instruments in this family
  • Confirmed with a live offer and a well-established listing (7+ sellers) on Amazon.de
  • No mould-risk alarm and no app logging — a plain dial reading only

Best for: Anyone who wants a permanent, no-maintenance reading on a wall or shelf and doesn't need an alarm, app, or data history.

≈ 14 €
Check price on Amazon

Specifications

Measures
Indoor temperature and relative humidity
Mechanism
Analog dial, no battery required
Display
Colour-coded comfort zones marked directly on the dial
EAN
4009816020284

The trade-off against the two digital options

This family also includes a TFA Dostmann digital model with a mould-risk alarm and a SwitchBot model with app logging. This analog dial gives up both of those features in exchange for never needing a battery — a real advantage for a wall-mounted instrument that’s easy to forget about until the battery dies and the display goes blank.

What “colour-coded comfort zones” means in practice

Rather than a numeric alarm threshold, the dial itself is marked with coloured bands showing roughly comfortable versus too-dry or too-humid ranges — a read-at-a-glance design rather than one requiring you to remember a target number.

Where we actually confirmed it for sale

We confirmed a live offer, with 7 or more active sellers, on Amazon.de. We found the identical EAN listed on Amazon.fr as well, but did not confirm an active offer behind that listing at the time of checking.

More thermo-hygrometers

  • TFA Dostmann Comfort Control 30.5011 digital thermo-hygrometer

    TFA Dostmann Comfort Control 30.5011

    A compact digital thermo-hygrometer from TFA Dostmann, with a stated mould-risk alarm and a comfort-zone display. Confirmed with a live offer and a well-established listing (11+ sellers) on Germany, France and Italy; we did not find a confirmed listing on Amazon.es.

    Measures
    Indoor temperature and relative humidity
    Display
    Digital, with a stated mould-risk alarm and comfort-zone indicator
    Power
    Battery-powered, per the listing
    Amazon reference
    B000JG2RAG (identical ASIN on DE/FR/IT)
    • A well-established listing with double-digit seller counts on every market we checked, unlike several single-offer accessories in this network
    • The stated mould-risk alarm is a genuinely useful trigger for the humidity ranges this network's guides discuss
    • No confirmed listing found on Amazon.es at the time of checking

    Best for: Anyone running a humidifier or dehumidifier in this network who wants an independent, cheap reading of the room rather than trusting the appliance's own onboard sensor.

    ≈ 25 €
    Check price on Amazon
  • SwitchBot Bluetooth indoor thermo-hygrometer with app connectivity

    SwitchBot Thermometer Hygrometer Indoor

    SwitchBot's standalone indoor thermo-hygrometer, pairing over Bluetooth to log temperature and humidity history in the SwitchBot app, alongside dew point and VPD readouts. Confirmed with a live offer on Amazon.de; we found the same listing on Amazon.fr but did not confirm a live offer there at the time of checking.

    Measures
    Indoor temperature, relative humidity, dew point, VPD
    Connectivity
    Bluetooth, with data logging via the SwitchBot app
    Power
    Battery-powered, per the listing
    EAN
    0850007706241
    • Confirmed with a live Amazon offer on Germany at the time of checking
    • App logging adds a history graph the basic TFA instrument in this family doesn't offer
    • We found a matching listing on Amazon.fr but did not confirm a live offer there at the time of checking

    Best for: Anyone who already owns the SwitchBot CO2 monitor and wants humidity and temperature logged in the same app, rather than reading a standalone display.

    ≈ 17 €
    Check price on Amazon

Elsewhere in the spares drawer

  • vhbw third-party 2-piece HEPA and activated carbon filter set for the Dyson Purifier Cool TP11

    vhbw 2-Piece Filter Set for Dyson Purifier Cool TP11

    A third-party 2-piece filter set from vhbw, combining a HEPA element and an activated carbon element sized for the Dyson Purifier Cool TP11 — the model reviewed on this site as the PC1. Dyson doesn't sell a separately branded replacement for this generation on the markets we checked; we confirmed a real, single-offer listing on three European markets.

    Set contents
    1 HEPA element + 1 activated carbon element
    Compatible models
    Dyson Purifier Cool TP11, TP12
    Source
    Third-party (vhbw), not an official Dyson part
    EAN
    4070351453295 (identical on DE/FR/IT)
    • Purpose-built for the TP11/TP12 generation, not a generic universal-fit listing
    • Confirmed with a live offer and the identical EAN across Germany, France and Italy
    • Third-party, not a Dyson-branded part — no manufacturer warranty coverage on the filter itself

    Best for: Owners of the Dyson Purifier Cool PC1 (TP11) who need a replacement filter set and are comfortable with a third-party part, since Dyson itself doesn't list a separately branded replacement for this generation on the markets we checked.

    ≈ 42 €
    Check price on Amazon
  • ALITOVE universal 5V 1A power adapter with 8 interchangeable connector tips

    ALITOVE Universal 5V 1A Power Adapter (8-Tip)

    A generic 5V DC power adapter rated up to 1A (5W), sold with 8 interchangeable connector tips to match different barrel-plug sizes. This is a universal-fit accessory, not one built for a specific reviewed model — the voltage, current and polarity printed on your original adapter's label are what actually determine a safe match, not the appliance's brand or size. Confirmed with a single live offer on Amazon.de; we did not find a listing on the other three markets we checked.

    Output
    5V DC, up to 1A (5W)
    Connector
    8 interchangeable barrel-plug tips included
    Fit type
    Generic / universal — voltage and polarity match required
    Input
    100-240V AC, per the listing
    • Confirmed with a live offer on Amazon.de
    • 8 interchangeable tips cover several common barrel-plug sizes without buying multiple adapters
    • 5V/1A only — not a fit for any appliance in this network needing a higher voltage or current, which must be checked on the original adapter's label first

    Best for: A small, low-power device — most commonly an air-quality monitor or a small humidifier accessory in this network — that specifically takes 5V/1A and whose original adapter has failed, confirmed against the original's printed label first.

    ≈ 11 €
    Check price on Amazon
  • Bosch original replacement filter 2-pack for the Dry series dehumidifiers

    Bosch Original Filter for Dry Series (2-Pack)

    Bosch's own replacement filter for its Dry series dehumidifiers, covering the 1000, 2000 and 4000 models — including the Dry 4000 reviewed on this site. Confirmed with a live offer on Amazon.de; we found the same listing on Amazon.fr but did not verify a live offer there at the time of checking.

    Compatible models
    Bosch Dry 1000, Dry 2000, Dry 4000
    Pack size
    2 filters
    Source
    Official Bosch part
    EAN
    4069143068687
    • Official Bosch part, matching the model reviewed on this site exactly
    • Confirmed with a live offer and multiple sellers (5) on Amazon.de
    • We found a matching listing on Amazon.fr but did not verify a live offer there at the time of checking

    Best for: Bosch Dry 4000 owners who want the manufacturer's own filter rather than a third-party alternative.

    ≈ 30 €
    Check price on Amazon

All thermo-hygrometers