Build your next product with a direct factory specialized in time, temperature, humidity, and fluid measurement. From your CAD drawings or physical samples to 100+ private molds, custom tooling, and high-volume delivery.
Select from our mature product platforms, start with private molds, or develop exclusive tooling. Each line is engineered for high market acceptance and reliable B2B delivery.
Projection clocks, LED mirror clocks, FM radio alarm clocks, and smart desk platforms.
Indoor/outdoor temperature monitors, humidity gauges, comfort indicators, and precision probes.
Multi-channel wireless weather forecast stations, barometric displays, and atomic clock sync.
Ultrasonic tank level gauges, wireless pool thermometers, sauna gauges, and electrical meters.
Dongguan Man Jianghong Electronics Co., Ltd. mainly focuses on the R&D, design, production and sales of time, temperature, humidity, and electrical parameter devices. Backed by 20+ years of manufacturing experience and an outstanding business reputation in the smart home & measurement industry.
Our mature product lines include: Floating Pool Thermometers, Ultrasonic Tank Level Gauges, Sauna Gauges, FM Radio Alarm Clocks, LED Mirror Clocks, Ceiling Projection Clocks, Electronic Thermo-Hygrometers, Color Weather Stations, Rain Gauges, BBQ Meat Thermometers, and Smart APP Temperature Controllers.
Our products are widely exported to developed markets across North America, Europe, and Asia. All models pass rigorous compliance testing including CE, RoHS, FCC, FDA, and WEEE certifications. Furthermore, the company holds multiple domestic and European Union (EU) design patent certificates to safeguard our clients’ market exclusivity.
Most suppliers only print a logo. We help you create high-margin products that are difficult to copy, highly differentiated, and protected in your regional market.
Share your drawing, sample, or brief. Our engineering team creates 3D models and confirms functions, materials, and target manufacturing cost.
Develop working prototypes, open custom tooling when required, and align LCD/LED displays, firmware, packaging, and regional languages.
Pass sample sign-off, strict 5-stage QC testing, and production scheduling before consistent volume delivery to your warehouse.
MJH combines in-house mold engineering, SMT assembly, 5-stage QC inspection, and full export compliance into one seamless source-factory workflow.
Developed custom tooling and 7-language weekday firmware for a major European brand, granting regional exclusivity.
Engineered wireless sensor transmission with high accuracy probes and low-power LCD receiver, generating 50,000+ annual reorders.
Custom waterproof ultrasonic housing, solar recharging option, and custom retail packaging for US/AU pool accessory distributors.
Yes. We have 100+ ready private molds, and we offer complete new mold tooling (3D modeling, prototyping, mold opening). After opening a mold, we can sign an exclusive sales agreement for your target country/region.
Yes. Our firmware supports multi-language week display including English, German, French, Spanish, Italian, Japanese, and Dutch.
All our products are manufactured to meet CE, RoHS, FCC, FDA, and WEEE standards. We provide test reports and compliance files for smooth customs clearance.
Standard samples can be sent within 1-3 business days; custom samples take 7-12 days. Mass production lead time typically ranges from 25 to 35 days depending on the quantity and customization level.
Send us your product specs, target quantities, and custom requirements. Our technical sales team will reply with suitable models, MOQ, sample options, and pricing within 24 hours.
🔒 Privacy Guaranteed: We protect your technical data and business inquiries under strict factory NDA standards.
