Current price
$189 current Amazon U.S. reference
Refresh due soonDirect source1 evidence itemConfirm exact HOME model, authorized seller, new condition, stock, tax, warranty and returns; PRO and HOME records are not interchangeable
SAF Tehnika · TDSPC0H3
Aranet4 HOME
A battery e-ink monitor for NDIR CO2, temperature, humidity and pressure with local display, Bluetooth history and adjustable samplingMarket statusCurrent supported local-first CO2 display monitorChecked Aug 18
Reference price$189 current Amazon U.S. referenceThe exact TDSPC0H3 Aranet4 HOME is currently offered at $189 through Amazon's U.S. retail path
Product cyclecurrentRelease history under review
EvidenceWell supported7 publishers · 2 independent
Next full checkAug 25, 2026Price checks run sooner
01
Ready to buy
Confirm the exact monitor and data path
The retained reference is $189 current Amazon U.S. reference. Confirm the model, sensors, calibration, sampling, app or local history, privacy, power, placement, stock, returns and written U.S. support before payment.
Buying stageMarket familiarity
02
Current market
The facts that change the ownership choice
Each line carries its own check date because price, software, specifications, and product cycle do not age at the same speed.
QuestionCurrent answerFreshnessBasis
Market branch
focused local-first CO2 and ventilation tracking
Checked 6 days agoOur synthesis2 evidence itemsPurchase boundary
The retained $189 comes from the current Amazon brand-store path; it measures no PM, VOC or radon, and optional gateway or cloud use is separate from its strong offline display and Bluetooth core
Checked 6 days agoOur synthesis3 evidence itemsSensor suite and exclusions
Senseair Sunrise NDIR CO2, temperature, humidity and pressure are retained; there is no PM, VOC, CO, radon, smoke or formaldehyde measurement, and the screen's traffic-light threshold is not an additional sensor
Checked 6 days agoDirect source2 evidence itemsRanges, accuracy and disclosed gaps
The sheet states CO2 0 to 9,999 ppm with ±30 ppm plus 3 percent from 0 to 5,000, temperature 0 to 50°C at ±0.3°C, humidity 0 to 85 percent at ±3 percentage points and pressure 600 to 1,100 hPa with named error bands
Checked 6 days agoDirect source3 evidence itemsCalibration, drift and response
Selectable one-, two-, five- or ten-minute intervals affect response and battery life. Manual fresh-air calibration is recommended periodically; optional automatic background calibration requires regular low-background exposure and can mis-correct continuously occupied or high-CO2 spaces
Checked 6 days agoOur synthesis5 evidence itemsData, app and cloud
The e-ink screen and local device history remain useful without Wi-Fi. Bluetooth supports the Aranet Home app and export; gateway or cloud deployments are separate products and must retain their own account, network and retention terms
Checked 6 days agoDirect source3 evidence itemsPrivacy boundary
Local display and Bluetooth can minimize cloud exposure, but phone permissions, app telemetry, exports and any gateway or cloud service still need review. Room names and occupancy-linked time series can be sensitive even without names
Checked 6 days agoOur synthesis2 evidence itemsPower and placement
Two AA batteries support about two years at stated settings. Place at breathing height away from direct exhalation, open windows, vents, sun and heat; portable meeting-room use requires a settle period and recorded location
Checked 6 days agoOur synthesis3 evidence itemsService and lifecycle
Confirm battery type, annual calibration routine, firmware and app support, regional warranty and replacement route. The NDIR sensor is not represented as a user-replaceable calibrated module
Checked 6 days agoDirect source2 evidence itemsInterpretation boundary
CO2 is a useful occupancy and ventilation tracer but cannot show PM, VOC, pathogens or clean-air delivery by itself. Compare indoor trends with plausible outdoor background and room use; do not infer infection risk, source identity, health outcome or safety clearance
Checked 6 days agoOur synthesis5 evidence itemsConsumer sensor versus reference method
Published ranges and nominal errors describe manufacturer conditions, not traceable performance for every unit, aerosol, gas mixture, humidity, firmware, age or site. Use co-location and documented quality checks; do not substitute this monitor for a regulatory, occupational, laboratory, radon or life-safety method.
Checked 6 days agoOur synthesis4 evidence itemsSeller and region
The price is retained for a current U.S. new-device path. Confirm exact model, authorized seller, electrical and radio region, stock, tax, delivery, returns, written warranty, replacement parts, app and cloud service before payment.
Checked 6 days agoOur synthesis2 evidence itemsCurrent verdict
The focused CO2 reference
Checked 6 days agoOur synthesis13 evidence itemsAranet4 HOME is the defended focused CO2 instrument when readable local operation, long battery life and explicit calibration control matter more than a broad pollutant list.
03
Other paths
The alternatives change what the Aranet4 HOME is worth
These are not generic competitors. Each one represents a different way to buy into the same market.
01lower upfront
Airthings
Wave Enhance
$159.99 current direct U.S. price- Best fit
- sleep, room-use and ventilation context without PM or radon
- Tradeoff
- The retained $159.99 is the North American model 322; it has no numerical screen, PM or radon, and remote access requires a compatible hub or View path
02ownership
Qingping
Air Monitor Lite
$76 current direct U.S. reference- Best fit
- compact value PM and CO2 display
- Tradeoff
- The retained $76 direct reference is unusually low for the channel set; U.S. app region, Apple Home or Qingping+ path, charger, stock and support must be verified, and Mi Home is not the supported U.S. route
04
What changed
The product has a history
Older observations stay in the ledger when the current view changes. That lets a buyer tell the difference between an old complaint, an active issue, and a problem that was corrected.
- notable
Current monitor evidence retained
Aranet4 HOME was checked against current U.S. manufacturer identity and price, exact specification or manual, support and privacy terms, independent evaluation and bounded owner or operator evidence.
Price record
The price history starts here
Each amount stays tied to its source and capture date. Conflicting prices remain visible until the seller resolves them.
- $189 current Amazon U.S. reference
Current reference priceA structured timeline will begin with the next source capture
05
Owner experience
What repeats after the purchase
Owner and operator evidence is retained as a setup, response, data and service checklist for Aranet4 HOME, not an accuracy, reliability, health or safety rate.
Reports are self-selected and span different units, firmware, calibration, sites, pollutants, humidity, event sources, comparisons, networks, accounts and ages. They cannot prove reference accuracy, source identity, population reliability, exposure, health outcome, compliance or safety clearance.SignalWhat owners reportOur readEvidence
fresh-air calibration, automatic-baseline settings, interval choice, battery life and room-to-room settling
Self-selected exact-family users discuss calibration, battery, app, display and colocations. Reports are operational prompts and do not establish accuracy or reliability rates.
Record manual or automatic calibration state and sampling interval, then keep the device fixed through comparable occupied and unoccupied periods before using it to change ventilation
1 evidence record06
Sources
Why we believe the current view
The page separates what a source states directly from what we conclude across sources.
01Aranet4 HOME current manufacturer recordSAF Tehnika · identity
SAF Tehnika identifies TDSPC0H3 as a battery e-ink monitor for NDIR CO2, temperature, humidity and pressure with local display, Bluetooth history and adjustable sampling.
- Source type
- manufacturer
- Content hash
- 68d552692032d156…
- Use
- store excerpt
02Aranet4 HOME current U.S. priceSAF Tehnika · price
The exact TDSPC0H3 Aranet4 HOME is currently offered at $189 through Amazon's U.S. retail path.
- Source type
- retailer
- Content hash
- 993a99c1036fe5a5…
- Use
- store snapshot
03Aranet4 HOME manual and measurement specificationSAF Tehnika · specification
The current model documentation supports the retained sensor suite, measurement ranges or disclosed absences, calibration and response, power, placement and operating boundaries.
- Source type
- support
- Content hash
- fbb4de3d56dc524b…
- Use
- store excerpt
04Aranet4 HOME current support and serviceSAF Tehnika · specification
Confirm battery type, annual calibration routine, firmware and app support, regional warranty and replacement route. The NDIR sensor is not represented as a user-replaceable calibrated module
- Source type
- support
- Content hash
- c4336ac24bd452b2…
- Use
- store excerpt
05Aranet4 HOME privacy and data termsSAF Tehnika · software
Local display and Bluetooth can minimize cloud exposure, but phone permissions, app telemetry, exports and any gateway or cloud service still need review. Room names and occupancy-linked time series can be sensitive even without names
- Source type
- support
- Content hash
- e1aa53c8c3b40843…
- Use
- store excerpt
06How to use air sensors and the Air Sensor GuidebookU.S. Environmental Protection Agency · specification
EPA separates lower-cost air-sensor information from regulatory monitoring and emphasizes study design, siting, quality checks, interpretation and communication of uncertainty.
- Source type
- support
- Content hash
- 00774782ed9fbe35…
- Use
- store excerpt
07Improving your indoor environmentU.S. Environmental Protection Agency · specification
EPA places monitoring inside source control, ventilation, filtration and moisture-management decisions rather than treating a sensor reading as source identification, diagnosis or proof of safety.
- Source type
- support
- Content hash
- 7db9daa987bfadbb…
- Use
- store excerpt
08Radon guidanceU.S. Environmental Protection Agency · specification
EPA radon guidance uses validated testing, named decision thresholds and mitigation follow-up; a short consumer display change is not a radon clearance result.
- Source type
- support
- Content hash
- 75d4fad51cab5d99…
- Use
- store excerpt
09Carbon monoxide fact sheetU.S. Consumer Product Safety Commission · specification
CPSC guidance requires functioning carbon-monoxide alarms and emergency response to alarm or symptom conditions. A general air-quality monitor is not a substitute.
- Source type
- support
- Content hash
- cf427cddb9c401bc…
- Use
- store excerpt
10Evaluating indoor air-quality monitoring devices for healthy homesBuildings · specification
A peer-reviewed residential-device evaluation includes Aranet4 and compares consumer channels under common indoor procedures, while distinguishing device response from reference-grade or health-outcome validation.
- Source type
- editorial
- Content hash
- d41c630ad37a4349…
- Use
- store excerpt
11Aranet4 owner and operator forumAranet Forum · consensus
Self-selected exact-family users discuss calibration, battery, app, display and colocations. Reports are operational prompts and do not establish accuracy or reliability rates.
- Source type
- community
- Content hash
- 5c993084507dce7d…
- Use
- store excerpt
12Wave Enhance alternativeAirthings · alternative
Wave Enhance is the sleep, room-use and ventilation context without PM or radon alternative at $159.99 current direct U.S. price.
- Source type
- manufacturer
- Content hash
- 8639d3dd76c9890b…
- Use
- store excerpt
13Air Monitor Lite alternativeQingping · alternative
Air Monitor Lite is the compact value PM and CO2 display alternative at $76 current direct U.S. reference.
- Source type
- manufacturer
- Content hash
- 3ff5a16111853c7f…
- Use
- store excerpt
Manufacturer identity, exact current U.S. price, specification or manual, support, independent evaluation and bounded owner or operator evidence were checked on August 18, 2026. This market covers current complete U.S.-supported indoor-air monitors for serious residential, school, office or building-owner use. It excludes smoke and carbon-monoxide life-safety alarms, basic single-purpose thermometers or hygrometers, sensors integrated into purifiers or dehumidifiers, HVAC controls, laboratory reference analyzers, professional handheld instruments, unsupported marketplace devices, cosmetic bundles and minor connectivity variants. Consumer low-cost sensors are not regulatory or laboratory reference methods. Optical PM estimates mass from scattered light and varies with aerosol, size distribution, humidity, inlet condition, correction and aging. Metal-oxide VOC, eTVOC and gas-index channels respond to mixtures, humidity and rolling baselines, may cross-react and cannot identify a source or specific compound; even a named low-cost formaldehyde channel needs interference and method scrutiny. NDIR CO2 can drift, and automatic baseline correction assumes periodic exposure near outdoor background. CO2 is an occupancy and ventilation clue, not proof of clean air, infection risk or safety. Radon decisions require the named averaging period and confirmation appropriate to EPA guidance. Site monitors in representative occupied air away from vents, windows, heat, direct sun, humidifiers and immediate sources unless testing that source. Nearby outdoor data adds context only when time, distance, weather and source differences are retained. No monitor identifies a source, diagnoses health, certifies ventilation or regulatory compliance, clears a space as safe, or replaces certified smoke and carbon-monoxide alarms. A monitor does not clean air, dehumidify a room or control HVAC unless a separate reviewed system does that work.
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