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RS485 Interface Duct Humidity and Temperature Sensor for HVAC
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RS485 Interface Duct Humidity and Temperature Sensor for HVAC

DB4385 sensor is designed to measure the temperature and relative humidity of interior air in spaces by a common internal sensor, whose signal is processed by a microprocessor and converted into a MODBUS RTU output signal. It is widely used in measurement scenarios such as industrial sites, telecommunication base stations, offices, supermarkets, production workshops, warehouses, and construction sites.
Model DB4385
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Detail

Specification


Measurement rangeHumidity:0%RH~100%RH;Temperature:-40~120℃(measurement range supports customization)
Accuracy@20%RH~80%RH @25℃Humidity:±3%RH;Temperature:±0.4℃
InterfaceRS485, Modbus RTU
Response time1.6s
Programmable address1~255
Baud rate1200~115200
Supply voltage12~24VDC
Transmitter operating temperature-20℃~80℃
Power consumption<4W
MaterialTransmitter:cast aluminum;Probe:304 stainless steel;Probe:copper sintering



FAQ – Frequently Asked Questions


1. Where are your products manufactured?

Our products are proudly designed and manufactured in China, following international quality standards and certified processes.


2. Can you provide OEM/ODM services for international clients?

Yes, we offer customized solutions and private labeling to meet your brand’s needs worldwide.


3. Are your products compliant with international safety and quality standards?

Absolutely. Our products are tested to meet CE, RoHS, and other international certifications.


4. How do you handle shipping and delivery for overseas orders?

We cooperate with major international couriers to ensure fast and reliable delivery to your location.


5. Can I get product samples before placing a large order?

Yes, we provide samples so you can evaluate product quality before committing to bulk orders.


6. What is the typical lead time for production and delivery?

For standard products, we usually ship within 5–7 days after order confirmation. Customized products may take slightly longer.


7. How do you support clients after the purchase?

We offer 24/7 technical support, product guidance, and warranty service to ensure smooth operation.


8. Do you provide support for international clients after purchase?

Yes, we offer remote technical assistance, manuals in English, and prompt solutions to any issues, ensuring smooth use worldwide.


9. How can I place an order if I am located overseas?

You can contact our sales team directly via email or website inquiry. We provide professional guidance throughout the ordering process.


10. Why should I choose your company over other suppliers in China?

We combine over 30 years of manufacturing experience, advanced technology, strict quality control,

and global customer service to deliver reliable, high-quality solutions.


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