Shenzhen YGhao · OEM/ODM thermo-hygrometers since 1999
Four in-production references — YGH5253SY LCD clock with comfort icons, YGH5275Y WiFi smart-home clock, YGH5289SY compact round mini meter, and YGH5291 classic meter with 24h min/max logging. Shenzhen assembly, CE/FCC/RoHS-aligned documentation, MOQ-friendly for retail and distributor programs.
YGH5253SY LCD clock · YGH5275Y WiFi · YGH5289SY compact round · YGH5291 min/max logging — photos & highlights →
Calibrated temperature and humidity paths with contrast-tuned LCD — strong for kitchen, desk, and nursery retail.
DRY / COMFORT / WET bands, min/max logging, and optional WiFi app control — validated before mass production.
Four in-production SKUs with logo, packaging, sensor calibration notes, and manuals locked in your spec sheet.
YGH5253SY
Clock + temp/RH · DRY/COMFORT/WET comfort icons
Desktop / kitchen · home & office · clock + comfort reference
YGH5275Y
2.4 GHz WiFi · app · ~3.7″ LCD clock face
Smart home · connected retail · not YGH5275T heat-stress line
YGH5289SY
Mini round body · full-screen LCD · travel-friendly
Gift · travel · compact round shelf programs
YGH5291
24h min/max logging · comfort-level icons
Shelf logging · nursery · classic meter programs
Key parameters at a glance. OEM programs can adjust alerts, presets, and packaging per your market.
| Item | YGH5253SY | YGH5275Y | YGH5289SY | YGH5291 |
|---|---|---|---|---|
| Use case | Desktop / kitchen · home & office · clock + comfort reference | Smart home · connected retail · not YGH5275T heat-stress line | Gift · travel · compact round shelf programs | Shelf logging · nursery · classic meter programs |
| Display | LCD time, date, temperature & humidity | Approx. 3.7″ LCD — time, temp, RH | Round compact LCD — full-face readout | Classic LCD — temp, RH, comfort icons |
| Temperature | Indoor °C/°F (calibrated per BOM) | Indoor °C/°F · app history (program) | Indoor °C/°F | Indoor °C/°F · 24h min/max record |
| Humidity | Indoor RH% with comfort-level icons | Indoor RH% · alerts via app (program) | Indoor RH% | Indoor RH% · 24h min/max record |
| Clock | 12/24h clock · calendar (program) | 12/24h · date · backup time hold | Optional clock row (confirm per BOM) | Time display (program) |
| Power | CR2032 coin cell | AAA × 2 backup · mains/USB per BOM | CR2032 coin cell | CR2450 coin cell |
| Connectivity | Standalone — no app required | WiFi 2.4 GHz IEEE 802.11 b/g/n · companion app | Standalone | Standalone |
| Dimensions | 70 × 70 × 14 mm | 90.5 × 87.5 × 23 mm | Compact round — OEM diameter on spec sheet | Classic desktop footprint — OEM on spec sheet |
| Packaging OEM | White / color retail box OEM | Color box + quick-start OEM | Blister / gift box OEM | Color retail box OEM |
White-background factory reference photos — select a model tab. Full datasheets available on request.
Clock + temp/RH · DRY/COMFORT/WET comfort icons
Use cases: Kitchen countertop, desk, nursery, and gift retail
OEM hooks: Logo, comfort icon artwork, manual languages
2.4 GHz WiFi · app · ~3.7″ LCD clock face
Use cases: Smart-home retail, nursery monitoring, connected gift sets
OEM hooks: App branding, RF module, comfort alerts, manual QR
Mini round body · full-screen LCD · travel-friendly
Use cases: Travel retail, promotional gifts, compact fixture sets
OEM hooks: Round lens color, logo insert, hang-tab box
24h min/max logging · comfort-level icons
Use cases: Nursery, wine cellar monitoring, hardware and DIY retail
OEM hooks: Comfort bands, max/min reset UX, logo silk
YGhao Shenzhen — thermo-hygrometer OEM/ODM since 1999 for retail, Amazon-first, and distributor programs worldwide.
Brand existing references or co-develop a new thermo-hygrometer platform on our integrated Shenzhen campus.
RH/T calibration, comfort-level logic, min/max logging, and multi-language UI.
Housing injection, round or square lenses, and button tactile tuning.
Sensor accuracy, WiFi provisioning, RF checks, and battery life sampling.
Color boxes, inserts, barcodes, and retailer compliance artwork.
WiFi module selection, app strings, and backup power paths for connected SKUs.
CE, FCC, RoHS build-of-materials and test reports per program.
From requirements through golden sample and mass production on our integrated campus — full ODM capabilities include DFM, tooling, and compliance documentation.
Channel, price band, sensing UX, and certification targets.
ID/UX, display layout, sensor BOM, and WiFi goals.
EVT units, RH/T accuracy and comfort-icon evaluation.
Retail or Amazon test lots with field feedback.
SOP, fixtures, lot traceability, FOB/CIF.
ECO, spare parts, and firmware / app updates.
Thermo-hygrometer programs at scale — home, nursery, and smart-home categories worldwide
Shenzhen YuanGuangHao Electronics Co., Ltd. (YGhao) runs ISO 9001–aligned IQC/IPQC/OQC with CE/FCC/RoHS evidence for retail and distributor programs. Sensor calibration, comfort-level UX, and battery life are agreed in writing before mass production.
Established 1999 · integrated Shenzhen campus · thermo-hygrometer OEM at scale
Partner brands
EU, North America, and Asia-Pacific buyers — one Shenzhen campus for thermo-hygrometer OEM/ODM
Retail and brand programs for timers, thermo-hygrometers, and environmental instruments — engineered and built in Shenzhen since 1999.
Private-label thermo-hygrometers with DRY/COMFORT/WET UX, multi-language manuals, and retailer packaging — from EVT through MP.
YGH5275Y-class programs with app provisioning, 2.4 GHz compliance, and backup power for North America and EU channels.
Mini round meters and shelf logging SKUs developed with brand owners — sensor validation and export documentation from one campus.
Meetings & trade shows
Common questions before sourcing — contact us for program-specific terms
YGH5253SY suits desktop clock + comfort-icon retail. YGH5275Y is the WiFi smart-home reference (not the YGH5275T Korea heat-stress SKU). YGH5289SY fits compact round gift lines. YGH5291 targets 24h min/max logging on shelf. Share your channel and we will recommend a BOM.
Yes — DRY/COMFORT/WET artwork, alert rules, app branding, manuals, and retail boxes are locked in a written spec before mass production.
MOQ depends on housing and connectivity; many meter programs start around 1,000–3,000 pcs per SKU. Pilot builds are commonly 2–4 weeks after EVT sign-off, with mass-production lead times shared in quotation.
We maintain ISO 9001 processes and supply program-appropriate CE, FCC, and RoHS evidence. WiFi SKUs include RF documentation where required — state your destination in the inquiry form.
Yes. We support new enclosures, sensor layouts, and firmware / app behaviors from industrial design through validation and MP on our Shenzhen campus.
Functional test covers RH/T calibration against reference chambers, comfort-level thresholds, min/max logging, WiFi provisioning on connected SKUs, and battery life sampling before shipment.
Send your target models and quantity — our Shenzhen team replies within one business day. Use the form above.