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Seven dollars and two published tolerances — more than five instruments here at any price

DOQAUS Z-001

A digital hygrometer accurate to ±1 °F and ±5 per cent humidity, refreshing every five seconds, with three mounting options.

DOQAUS digital hygrometer and indoor thermometer in black with 2.3-inch LCD

DOQAUS Z-001

A digital hygrometer accurate to ±1 °F and ±5 per cent humidity, refreshing every five seconds, with three mounting options.

Temperature accuracy
±1 °F
Humidity accuracy
±5% RH
Refresh
Every 5 seconds
Display
2.3 in LCD with large bold numbers
Comfort indicator
Three face icons: dry, comfort, wet
Mounting
Hanging hole, tabletop stand, magnet
Units
°F / °C switchable button
Weight
32 g (1.1 oz)
Range
Not stated by the maker
Amazon reference
B07ZSF5RC5
EAN
6438081253086
  • The tightest temperature tolerance on this shelf after one device — ±1 °F — at the lowest price here by a wide margin
  • Three mounting options including a magnet, so it goes on a fridge, a wall or a shelf
  • ±5% RH is the loosest humidity tolerance published on this shelf, tied with one other

Best for: Any room where the question is simply "is it too dry in here", at the least possible cost

≈ $7
Check price on Amazon

Specifications

Temperature accuracy
±1 °F
Humidity accuracy
±5% RH
Refresh
Every 5 seconds
Display
2.3 in LCD with large bold numbers
Comfort indicator
Three face icons: dry, comfort, wet
Mounting
Hanging hole, tabletop stand, magnet
Units
°F / °C switchable button
Weight
32 g (1.1 oz)
Range
Not stated by the maker
Amazon reference
B07ZSF5RC5
EAN
6438081253086

What the maker puts in writing

  • ±1 °F · ±5% RH
  • Refreshes every 5 seconds
  • 2.3 in LCD with large bold numbers
  • Three comfort faces: dry, comfort, wet
  • Hanging hole, stand and magnet · 32 g (1.1 oz)

Seven dollars, two published tolerances

That is the headline of this whole shelf. Five of the nine instruments here publish no accuracy, and two of those five cost over a hundred dollars.

This one publishes a degree and five per cent, refreshes every five seconds, and sticks to a fridge.

What it cannot do

Keep a record. Set an alert. Survive rain. Measure dew point. Tell you what the right numbers are.

Every one of those is available elsewhere on this shelf, and every one of them costs at least twice this.

Availability

Read on the day this page was built: $7 at the American Amazon shop.

Read from Keepa on the day this page was last revised; stock and price both move without notice.

Prices quoted in this text were read on 2026-10-04. The live price is at the top of the page.

The questions that keep coming up

Can a seven-dollar hygrometer be accurate?

This one publishes ±1 °F and ±5% RH, which is more than five of the nine devices on this shelf publish at any price — including two professional instruments at a hundred and twenty and two hundred and twenty dollars. Whether it holds those figures over years is not something any listing here addresses.

How does ±5% humidity feel in practice?

A reading of 45 per cent could be 40 or 50, which are both inside the comfortable band. It is enough to tell dry from damp, which is what the three face icons are for. If you need to hold a humidor or framed artwork at 50 per cent, the ±3% devices on this shelf are the ones to look at.

Does it keep a record?

No. Two devices on this shelf do: one keeps a 24-hour and all-time high and low on screen, the other logs twenty-day curves to an app. This one shows now.

More thermo-hygrometers

  • Gain Express handheld digital humidity and temperature meter with backlit LCD

    Gain Express HTM-238

    A handheld meter reading 0 to 100% humidity and −30 to 70 °C (-22 to 158 °F), with Max/Min, hold and a backlit display.

    Humidity range
    0 to 100% RH
    Temperature range
    −30 to 70 °C (−22 to 158 °F)
    Readings
    MAX / MIN, with a freeze function
    Display
    Dual large display with backlight
    Controls
    Two buttons; °C/°F; auto shut-off when idle
    Stated uses
    Agriculture, meteorology, household, lab, warehouse, air conditioning, quality control
    Accuracy
    Not stated by the maker
    Refresh rate
    Not stated by the maker
    Amazon reference
    B07GXLYF64
    EAN
    0600316548908
    • The widest published measurement range on this shelf: the full 0 to 100% RH and −30 to 70 °C (-22 to 158 °F)
    • MAX/MIN with a freeze function, which only the two professional instruments here also offer
    • No accuracy published, on a device whose selling point is its range

    Best for: Walking round a warehouse, greenhouse or crawl space taking spot readings

    ≈ $22
    Check price on Amazon
  • GoveeLife 2-in-1 indoor outdoor thermo-hygrometer with lanyard and LCD display

    GoveeLife H5171011

    An indoor-outdoor thermo-hygrometer accurate to ±0.54 °F and ±3% RH, rated IP65, with twenty-day curves and app alerts.

    Accuracy
    ±0.54 °F / ±3% RH
    Sampling
    Every 2 seconds
    Protection
    IP65 — rain and moisture, dustproof and sun-resistant; not for immersion
    Weight
    2.39 oz
    Battery
    Up to one year in Bluetooth mode
    Alerts
    Preset temperature and humidity thresholds, pushed to the app
    Data
    20-day curve readings; 2 years of free storage and export
    Mounting
    Nylon lanyard with adjustable buckle; hangs indoors or out
    Display
    LCD with a humidity comfort indicator, no ghosting
    Gateway
    Connects to GoveeLife gateways for remote monitoring
    Amazon reference
    B0FLQD2PC9
    EAN
    0810127738966
    • The tightest published accuracy on this shelf — ±0.54 °F and ±3% RH — and the fastest sampling at two seconds
    • The only device here with an ingress rating, IP65, so it works on a patio or a backpack
    • The alerts and the history need the app: on the device itself you get the current reading and a comfort icon

    Best for: A patio, greenhouse or backpack, or any room where you want the history rather than the moment

    ≈ $21
    Check price on Amazon
  • General Tools RHMG650 9-in-1 thermo-hygrometer and moisture meter with backlit LCD

    General Tools RHMG650

    A nine-function instrument combining a thermo-hygrometer with a pin and pinless moisture meter, recalling twenty reading pairs.

    Measurements
    9, including humidity, dew point and vapor pressure
    Moisture meter
    Pin and pinless
    Temperature range
    −20 to 167 °F
    Memory
    Recalls 20 reading pairs
    Display
    Large backlit LCD
    Accuracy
    Not stated by the maker
    Refresh rate
    Not stated by the maker
    Calibration
    Not stated by the maker
    Amazon reference
    B00I140G2E
    EAN
    0681035016084
    • The only instrument on this shelf with a pin and pinless moisture meter, which reads moisture inside timber and plaster rather than in the air
    • Publishes dew point and vapor pressure, which only one other instrument here does
    • Two bullets: no accuracy, no humidity range, no refresh rate, no calibration statement

    Best for: Building and restoration work, where moisture in a material matters more than comfort in a room

    ≈ $220
    Check price on Amazon

Elsewhere in the spares drawer

  • Foancie portable AC window vent kit with seal plates, exhaust hose and coupler

    Foancie 007-YinYo

    Four PVC plates to 64 inches with a 5.9-inch anti-clockwise hose, a coupler with a fitted filter and a brush sealing strip.

    Plates
    4, adjustable 43 cm (16.9 in) / 16.93 in to 162 cm (63.8 in) / 64 in
    Hose
    5.9 in / 15 cm diameter, anti-clockwise thread, up to 150 cm (59.1 in) / 59 in
    Coupler
    Included, with the filter pre-installed
    Sealing
    High-density woven brush strip to fill the gap between window and plate
    Plate material
    High-quality PVC
    Hose material
    Polypropylene
    Coupler material
    ABS
    Fixings
    4 screws
    Windows
    Most vertical and horizontal sliding windows and doors
    Amazon reference
    B09T3LSFDY
    EAN
    0607986566379
    • The only kit on this shelf that includes the plates, the hose AND the coupler — the coupler being the part two hoses on the neighboring shelf state they do not supply
    • A high-density woven brush strip, which is a better seal at a sliding window than tape and which nothing else here uses
    • Sixty-four inches of plate but only 59 inches of hose, so the machine has to sit close

    Best for: A 5.9-inch anti-clockwise portable air conditioner where nothing from the original kit survives

    Check price on Amazon
  • LOVIGA portable AC window vent kit in white fabric with drawstring hose opening

    LOVIGA US-WdSl-25162

    A fabric window seal 10 inches wide and adjustable from 40 to 64 inches, with a drawstring that closes around any hose from one to six inches.

    Type
    Fabric seal, not rigid plates
    Size
    10 in wide × 40 to 64 in long, adjustable
    Hose opening
    Drawstring, closing on any hose from 1 to 6 in
    Windows
    Horizontal or vertical sliding windows only, single-hung and double-hung
    Fabric
    Waterproof TU fabric with a heat-insulating whitening process to reflect sunlight
    Fixing
    Tape on the window frame, widened Velcro, double-stitched seams, Velcro ties for the hose
    Installation
    Open the window about 7.9 in; no drilling
    Before use
    Leave 24 hours after installation, as stated by the maker
    Warranty
    1 year, with 24-hour customer service
    Amazon reference
    B09ZHFT6LW
    EAN
    0701213188805
    • The drawstring closes on any hose from one to six inches, so the diameter problem that divides the hose shelf simply does not arise
    • The only kit on this shelf with a published warranty — one year — and the only one with numbered installation steps
    • Fabric rather than plates: it has to be taped to the frame and it is less rigid than PVC

    Best for: A rented flat, or any window where drilling is out and the hose diameter is awkward

    ≈ $17
    Check price on Amazon
  • TKOBAIV portable air conditioner window vent kit with plates and exhaust hose

    TKOBAIV 5.9inch

    Four PVC plates adjustable from 16.93 to 63 inches with a 5.9-inch exhaust hose and adaptor included.

    Plates
    2 fixing plates and 2 adjustable plates, 43 cm (16.9 in) / 16.93 in each
    Adjustable range
    16.93 in to 63 in
    Hose
    5.9 in / 15 cm diameter
    Adaptor
    5.9 in / 15 cm exhaust hose adaptor
    Fixings
    3 screws
    Material
    High-quality PVC, anti-aging and anti-squeezing
    Windows
    Almost all vertical and horizontal sliding windows or doors
    Thread direction
    Not stated by the maker
    Screen or filter
    Not stated by the maker
    Amazon reference
    B0GSS9BLX9
    EAN
    0747759789106
    • Includes the hose and the adaptor as well as the plates, for twenty-one dollars
    • Itemizes the contents down to the screw count, which is more than two kits on this shelf do
    • Three screws for four plates, by its own contents list

    Best for: A sliding window where the plates and a spare hose are both needed and the budget is tight

    ≈ $21
    Check price on Amazon

All thermo-hygrometers