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Last modified by Mengting Qiu on 2024/09/05 17:35
From version 84.1
edited by Xiaoling
on 2023/09/11 14:04
Change comment: Uploaded new attachment "image-20230911140426-2.png", version {1}
To version 84.4
edited by Xiaoling
on 2023/09/11 14:25
Change comment: There is no comment for this version

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2 2  
3 3  
4 4  **Table of Contents:**
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15 15  == 1.1 What is DDS20-NB NB-IoT Ultrasonic liquid level Sensor ==
16 16  
17 17  
18 -The Dragino S31-NB and S31B-NB are (% style="color:blue" %)**NB-IoT Temperature and Humidity Sensor**(%%) for Internet of Things solution. It is used to measure the surrounding (% style="color:blue" %)**environment temperature and relative air humidity precisely**(%%), and then upload to IoT server via NB-IoT network*.
19 +The Dragino DDS20-NB is a **NB-IoT Ultrasonic liquid level sensor** for Internet of Things solution. It uses **none-contact method **to measure the **height of liquid** in a container without opening the container, and send IoT platform via NB-IoT network.
19 19  
20 -The temperature & humidity sensor used in S31-NB is SHT31, which is fully calibrated, linearized, and temperature compensated digital output from Sensirion, it provides a strong reliability and long-term stability. The SHT31 is fixed in a (% style="color:blue" %)**waterproof anti-condensation casing**(%%) for long term use.
21 +The DDS20-NB sensor is installed directly below the container to detect the height of the liquid level. User doesn't need to open a hole on the container to be tested. The none-contact measurement makes the measurement safety, easier and possible for some strict situation. 
21 21  
22 -S31-NB supports different uplink methods include (% style="color:blue" %)**TCP, MQTT, UDP**(%%) for different application requirement. and Support Uplinks to various IoT Servers.
23 +DDS20-NB uses **ultrasonic sensing technology** for distance measurement. DDS20-NB is of high accuracy to measure various liquid such as: **toxic substances**, **strong acids**, **strong alkalis** and **various pure liquids** in high-temperature and high-pressure airtight containers.
23 23  
24 -S31-NB is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), It is designed for long term use up to several years. (Real-world battery life depends on the use environment, update period and uplink method. Please check related Power Analyze report).
25 +PS-NB-NA supports different uplink methods including **MQTT, MQTTs, UDP & TCP** for different application requirement, and support uplinks to various IoT Servers.
25 25  
26 -*make sure you have NB-IoT coverage locally.
27 +PS-NB-NA **supports BLE configure **and** OTA update** which make user easy to use.
27 27  
29 +PS-NB-NA is powered by **8500mAh Li-SOCI2 battery**, it is designed for long-term use up to severa years.
28 28  
29 -[[image:1692411831805-116.png]]
31 +PS-NB-NA has optional built-in SIM card and default IoT server connection version. Which makes it works with simple configuration.
30 30  
31 31  
34 +[[image:image-20230911140426-2.png||height="320" width="951"]]
35 +
36 +
32 32  == 1.2 ​Features ==
33 33  
34 34  
35 35  * NB-IoT Bands: B1/B2/B3/B4/B5/B8/B12/B13/B17/B18/B19/B20/B25/B28/B66/B70/B85 @H-FDD
36 36  * Ultra-low power consumption
37 -* External 3 meters SHT31 probe (For S31-NB)
38 -* Measure range -40°C ~~ 85°C
39 -* Temperature & Humidity alarm
42 +* Liquid Level Measurement by Ultrasonic technology
43 +* Measure through container, No need to contact Liquid
44 +* Valid level range 20mm - 2000mm
45 +* Accuracy: ±(5mm+S*0.5%) (S: Measure Value)
40 40  * Multiply Sampling and one uplink
41 41  * Support Bluetooth v5.1 remote configure and update firmware
42 42  * Uplink on periodically
43 43  * Downlink to change configure
50 +* IP66 Waterproof Enclosure
44 44  * 8500mAh Battery for long term use
45 45  * Nano SIM card slot for NB-IoT SIM
46 46  
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49 49  
50 50  (% style="color:blue" %)**Common DC Characteristics:**
51 51  
52 -* Supply Voltage: 2.1v ~~ 3.6v
59 +* Supply Voltage: 2.5v ~~ 3.6v
53 53  * Operating Temperature: -40 ~~ 85°C
54 54  
55 -(% style="color:blue" %)**Temperature Sensor:**
56 -
57 -* Range: -40 to + 80°C
58 -* Accuracy: ±0.2 @ 0-90 °C
59 -* Resolution: 0.1°C
60 -* Long Term Shift: <0.03 °C/yr
61 -
62 -(% style="color:blue" %)**Humidity Sensor: **
63 -
64 -* Range: 0 ~~ 99.9% RH
65 -* Accuracy: ± 2%RH ( 0 ~~ 100%RH)
66 -* Resolution: 0.01% RH
67 -* Long Term Shift: <0.25 %RH/yr
68 -
69 69  (% style="color:blue" %)**NB-IoT Spec:**
70 70  
71 71  (% style="color:#037691" %)**NB-IoT Module: BC660K-GL**