Product Name: Temperature Humidity Sensor
Model Name: DSR-0820
1. Introduction
1.1 Description
DSR-0820 is a Low Energy temperature and humidity data logger, It can collect the temperature and humidity of the surrounding environment. Such data can be recorded as history data. Its characteristics are small-sized, low-weighted, easily portable, and highly accurate for wide use in cold chain logistics, archives, labs, museums, etc.
At present, there are three different types of temperature and humidity sensors, DSR-0820-1 is a high-performance product based on Bluetooth protocol, DSR-0820-2 is based on Zigbee protocol, and DSR-0820-3 is a standard performance product based on Bluetooth protocol.
DSR-0820-1 with the Bluetooth v5.0 technology and Nordic NRF52832 chip. Built-in wireless transceiver PA chip, with the maximum transmission power of up to 20dBm, to achieve ultra-long distance stable transmission of data, can store up to 12000 pieces of the temperature and humidity data.
DSR-0820-2 with the Zigbee 3.0 technology and Silconlab EFR32 series chip. the maximum transmission power up to 17.5dBm, to achieve ultra-long distance stable transmission of data. It can store up to 12000 pieces of the temperature and humidity data.
DSR-0820-3 with the Bluetooth v5.0 technology and Nordic NRF52810 chip. the maximum transmission power up to 4dBm, Suitable for use at close range.
| Model | Bluetooth 5.0 | Zigbee 3.0 | Built-in PA | RTC | Temperature detect | Humidity detect |
| DSR-0820-1 | √ | √ | √ | √ | √ | |
| DSR-0820-2 | √ | √ | √ | √ | √ | |
| DSR-0820-3 | √ | √ | √ |
1.2 Application
- Refrigerated storage and transportation;
- Archives;
- Experimental (test) rooms;
- Workshop;
- Museums;
- Pharmaceutical environment;
- Fresh transport.
1.3 Product feature
- High accuracy and stability;
- Ultra long-distance(300m) wireless transfer (except DSR-0820-3);
- Built-in highly sensitive temperature and humidity sensor SHT20 (Sensirion);
- Real-time display temperature and humidity;
- It can store 12000 pieces of temperature and humidity data (except DSR-0820-3);
- You can set the alarm temperature range;
- Can be set as normal storage temperature and humidity data interval and alarm storage temperature and humidity data interval;
- Can by OTA update version.
2. Appearance
3. Product specification
| Item | DSR-0820-1 Bluetooth with PA | DSR-0820-2 Zigbee | DSR-0820-3 Bluetooth without PA |
|---|---|---|---|
| Signal transmission frequency | 2.400 – 2.4835GHz | 2.405GHz – 2.480GHz | 2.400 – 2.4835GHz |
| Protocol standard | Bluetooth 5.0 | Zigbee 3.0 | Bluetooth 5.0 |
| Send interval | 2S, adjustable | ||
| Built in battery | Panasonic CR123A ,1400mAh /3V | CR2450 550mAh | |
| Output power | 20dBm, adjustable | 17.5dBm,adjustable | 4dBm,adjustable |
| Communication rate | 1Mbps | 250Kbps | 1Mbps |
| Transmission distance | ~300 meters, adjustable | ~50 meters, adjustable | |
| Storage | Can be save 12000 temperature and humidity | Not support | |
| Battery life | ~3 years(Depends on the mode of operation) | ~1 year | |
| Net weight | 130 g | ||
| Outline size | 70mm*40mm*40mm (main body) | ||
| Detect temperature range | -40℃~ +125℃ | ||
| Operating temperature range | -25℃~ +60℃ | ||
| Humidity detection range | 0~100%RH | ||
| Temperature detection accuracy | ±0.3℃ | ||
| Humidity detection accuracy | ±3%RH | ||
| IP protection | IP 68 | ||
4. Caution
- Being close to a metal object will interfere with the signal, causing the signal to be weaken.
- Note the distance between DSR-0820 and the receiver to guarantee the accuracy of receiving.
- Keep away from corrosive objects.
5. Reference usage
Gateway usage
- Temperature & humidity sensor paired to the Bluetooth gateway.
- Bluetooth Gateway gets the data from the sensor and sends the information to Cloud via Wi-Fi or LTE once per second.
