Lab summary
- The H5075 shows temperature and relative humidity with stored maximum and minimum values and a DRY / COMFORT / WET indicator. It runs on two AAA batteries and sends data to the Govee Home app over Bluetooth, where readings can be graphed and exported [1] [2].
- Govee's manual states ±0.3 °C (±0.54 °F) for temperature and ±3% for humidity [1]. We found no independent published test of this model; a salt check (below) is a cheap way to test your own unit.
- The main limit is drift: small humidity sensors shift with time and after long spells in very damp air, and the app lets you apply an offset if yours reads high or low [1] [4]. It cost $11.69 on Sep 30, 2026 (1 pack, black), sold by Govee US and shipped by Amazon.
Table 1What it measures, and how
We read the H5075 user manual hosted on the Amazon listing, Govee's US product page and the Amazon listing on Sep 30, 2026. Govee says the sensor is Swiss-made but does not name the part or its sensing principle.
| What it measures | Sensor type | Validation evidence | Limits |
|---|---|---|---|
| Air temperature | Digital temperature and humidity sensor; part not disclosed ("Swiss-made", per Govee) [2] | Manufacturer tolerance only: ±0.3 °C / ±0.54 °F [1] | Operating range 0–50 °C (32–122 °F), per the manual [1]; Govee's web page gives a slightly different figure, ±0.5 °F / ±0.32 °C [2] |
| Relative humidity (%) | Same sensor package | Manufacturer tolerance only: ±3% [1]; the range over which it applies is not stated | Operating range 0–99% [1]; drifts with age and after prolonged high humidity (general sensor behavior, see Notes) |
| Comfort indicator (label, not a measurement) | Firmware rule on the two readings | Not an accuracy measure | DRY below 30%; COMFORT at 20–26 °C and 30–60%; WET above 60%, per the manual [1] |
Strip 1Accuracy strip
Two cells are Govee's stated tolerances; one marks the absence of independent testing. A tolerance is a limit the maker claims, not a measured result, and individual units can differ.
- Independent peer-reviewed study
- Manufacturer or regulatory filing data
- No published data found
- Temperature±0.3 °C (±0.54 °F)H5075 user manual specification; test conditions and n not stated[1]
- Relative humidity±3% RHH5075 user manual specification; humidity and temperature range for the figure not stated[1]
- H5075 vs. a reference hygrometerNo published data foundPubMed search for this model, Sep 30, 2026; no peer-reviewed or agency test located
Both tolerances are Govee's figures for the H5075 itself. Govee's product page rounds the temperature figure differently from the manual (±0.5 °F / ±0.32 °C versus ±0.54 °F / ±0.3 °C); we report the manual's.
NotesReading the evidence
Relative humidity is the amount of water vapor in the air as a percentage of the most the air could hold at that temperature. That dependence on temperature matters in practice: the same air reads a different relative humidity near a warm window than in a cool corner, so where you put the gauge is part of the measurement.
Govee's ±3% tolerance means that a reading of 45% could reflect air anywhere from about 42% to 48%, assuming the unit is within its specification. We found no independent study of the H5075, which is normal for a room gauge in this price range; the practical answer is to check your own unit.
Humidity sensors also drift. Govee does not name its part, so we cannot quote its drift figure, but a datasheet for a widely used Swiss-made sensor family (Sensirion SHT3x) shows what to expect from this class of component [4]. It lists typical long-term drift below 0.25% RH per year in normal conditions, notes that solvent vapors, adhesives or packaging materials can cause higher drift, and says long exposure to very humid air can temporarily offset the reading, for example by +3% RH after 60 hours above 80% RH, before it slowly recovers. That is one maker's part, not necessarily the one inside the H5075.
The salt check exploits a fixed point of physics. Air sealed above a damp slurry of ordinary table salt (sodium chloride) settles at a known relative humidity. The U.S. National Bureau of Standards (now NIST) compiled these values: 75.29% ± 0.12% at 25 °C and 75.47% ± 0.14% at 20 °C [3]. A hygrometer sealed in that air should read close to 75%. If it reads, say, 71% at room temperature, it is running about 4 points low near that level, and the H5075 app lets you enter a humidity offset of up to ±20% (and a temperature offset up to ±3 °C) [1]. One point checked at 75% does not prove the gauge is right at 40%, but it catches a unit that has drifted badly.
For context on the numbers you will see, the EPA advises keeping indoor humidity below 60%, ideally between 30% and 50% [5]. Govee's COMFORT band (30–60%) spans that advice, so a reading shown as COMFORT can still sit above the EPA's ideal range.
The H5075 measures the air around it, not a whole home, and not anything about a person. Readings are thrown off by sun on the case, a nearby heater, vent or humidifier, an outside wall, and the minutes after it is moved from one room to another. Its stated tolerances have not been independently tested, and the humidity figure can wander over months. Use it to follow trends and to spot rooms that stay persistently damp or dry.
ProcedureGetting cleaner readings
The salt check below follows the fixed-point principle in the NIST compilation [3]; the offset steps come from the H5075 manual [1]. None of this makes the gauge more precise than its specification.
Place it in still, shaded air
Stand it or hang it at an interior spot away from windows, vents, radiators and humidifiers, and give it time to settle after moving it. Keep it within its 0–50 °C operating range [1].
Make a damp salt slurry
Put a few spoonfuls of table salt in a small open cup and add just enough water to make a wet paste with undissolved salt still visible. The fixed humidity applies only while the solution is saturated [3].
Seal gauge and cup together
Place the cup and the H5075 in an airtight container or zip bag, without letting the salt touch the gauge, and keep it at a steady room temperature, out of the sun.
Wait for the reading to stop changing
Leave it until the humidity reading has been stable for several hours. Compare it with 75.3% (at 25 °C) or 75.5% (at 20 °C) [3].
Apply an offset only if it is clearly off
If the gap is larger than the ±3% tolerance, enter the difference as a humidity offset in the Govee Home app's calibration setting [1]. Recheck every few months.
LogPrice and where it is sold
On Sep 30, 2026, the Amazon listing "Govee Indoor Hygrometer Thermometer H5075 with Bluetooth App Control" showed $11.69 for the 1-pack in black, sold by Govee US and shipped from Amazon, in stock, with a free 30-day refund or replacement window. Multi-packs and a grey version are separate variations on the same listing. Govee rates battery life at about six months on two AAA batteries [2]. The Amazon listing may show a different price on another day.
Who should look elsewhere
- Anyone who needs certified measurements, for a museum, lab or instrument storage: choose a hygrometer sold with a calibration certificate.
- People who want remote readings away from home: the H5075 connects over Bluetooth only, so data syncs when your phone is in range.
- People who also want particle or VOC readings: a multi-sensor monitor such as the Amazon Smart Air Quality Monitor covers more quantities, with looser humidity tolerance.
- Anyone hoping a humidity reading will explain how they feel: it describes the room, and a symptom is a reason to talk to a clinician.
Sources
- Govee. H5075 Smart Thermo-Hygrometer user manual (specifications, comfort levels, app calibration ranges), PDF in the "Product guides and documents" section of the Amazon listing (ASIN B07Y36FWTT). Accessed Sep 30, 2026.
- Govee. Govee Bluetooth Hygrometer Thermometer H5075 product page (sensor, stated accuracy, battery life, app features). Accessed Sep 30, 2026. link
- National Bureau of Standards (now NIST). Humidity fixed points of binary saturated aqueous solutions, including sodium chloride. Journal of Research of the National Bureau of Standards, 1977. link
- Sensirion. SHT3x-DIS humidity and temperature sensor datasheet, version 7, December 2022 (long-term drift, recommended operating conditions). An example of this sensor class; not confirmed as the part in the H5075. Accessed Sep 30, 2026. link
- U.S. Environmental Protection Agency. A Brief Guide to Mold, Moisture and Your Home (indoor humidity guidance). Accessed Sep 30, 2026. link
This entry is educational and is not medical advice. Consumer wellness gadgets are not diagnostic devices; readings can be wrong. If a reading worries you, or you have symptoms, talk to a qualified clinician rather than relying on a gadget.