DS18B20 Digital Temperature Sensor | 1-Wire Thermometer
Shipping from China within 5–10 working days
- During check out, you can choose direct shipping from China, or let us import the order to our EU/US office first and ship it to you locally.
- Import customs clearance and VAT are fully handled by us.
Need a larger quantity?
Need bulk pricing?
Get a formal quotation with lead time and volume pricing.
For universities, companies, distributors, and project orders.
DS18B20 Digital Temperature Sensor | 1-Wire Thermometer
DS18B20 Digital Temperature Sensor - 1-Wire Thermometer for Distributed Temperature Monitoring
The DS18B20 is a programmable-resolution 1-Wire digital temperature sensor for thermostats, weather stations, industrial monitoring, device thermal protection, and distributed temperature networks. Each device has a unique 64-bit serial code, allowing multiple sensors to share one data bus.
It pairs well with the ELAB Nano V3, Raspberry Pi Pico W, and breadboard prototypes using the MB 102 Breadboard Kit. For air temperature and humidity monitoring, compare it with the DHT22 AM2302 sensor.
According to the Maxim/Analog Devices DS18B20 specification, the sensor supports 9-bit to 12-bit resolution, -55C to +125C measurement range, and +/-0.5C accuracy from -10C to +85C. See the official DS18B20 datasheet for final design limits.
Technical Specifications
| Parameter | Value |
|---|---|
| SKU | TB-DS18B20 |
| Sensor IC | DS18B20 |
| Interface | 1-Wire digital bus |
| Temperature Range | -55C to +125C |
| Accuracy | +/-0.5C from -10C to +85C |
| Resolution | User-selectable 9-bit to 12-bit |
| Supply Range | 3.0V-5.5V per DS18B20 datasheet |
| Conversion Time | Up to 750ms at 12-bit resolution |
| Unique ID | 64-bit ROM code per sensor |
| Power Modes | External supply or parasite power |
Board Layout & Label Guide
- DQ - 1-Wire data pin; use a pull-up resistor to VCC.
- VDD - External power input when not using parasite mode.
- GND - Ground reference.
- Pull-Up Resistor - Commonly 4.7k on the 1-Wire data line.
- Sensor Body - Place in the target thermal zone for accurate readings.
- Bus Wiring - Multiple DS18B20 sensors can share DQ if each ID is addressed.
- Cable Note - Long cables need careful grounding and pull-up selection.
- Thermal Note - Allow time for the package to reach ambient temperature.
Application Scenarios
1. Arduino Temperature Readout
Read DS18B20 temperature with OneWire and DallasTemperature libraries.
#include <OneWire.h>
#include <DallasTemperature.h>
OneWire oneWire(2);
DallasTemperature sensors(&oneWire);
void setup() {
Serial.begin(115200);
sensors.begin();
}
void loop() {
sensors.requestTemperatures();
Serial.println(sensors.getTempCByIndex(0));
delay(1000);
}
2. Multiple Sensor Scan
Print addresses for every DS18B20 on the bus.
#include <OneWire.h>
OneWire ds(2);
byte addr[8];
void setup() {
Serial.begin(115200);
}
void loop() {
if (ds.search(addr)) {
for (byte i = 0; i < 8; i++) Serial.print(addr[i], HEX);
Serial.println();
} else {
ds.reset_search();
delay(3000);
}
}
3. MicroPython 1-Wire Read
Read a DS18B20 from a MicroPython board.
import time
import onewire, ds18x20
from machine import Pin
bus = onewire.OneWire(Pin(15))
sensor = ds18x20.DS18X20(bus)
roms = sensor.scan()
while True:
sensor.convert_temp()
time.sleep_ms(750)
for rom in roms:
print(sensor.read_temp(rom))
time.sleep(1)
Packing List
- 1 x DS18B20 Digital Temperature Sensor
FAQ
Q: What interface does DS18B20 use?
A: It uses a 1-Wire digital bus.
Q: Can multiple sensors share one pin?
A: Yes, each DS18B20 has a unique 64-bit ROM code.
Q: What pull-up resistor should I use?
A: A 4.7k pull-up is common for short 1-Wire buses.
Q: What is the temperature range?
A: The datasheet range is -55C to +125C.
Q: What is the best accuracy range?
A: It is specified at +/-0.5C from -10C to +85C.
Q: Can it run from 3.3V?
A: Yes, the DS18B20 supply range is 3.0V to 5.5V.
Q: What is parasite power?
A: The sensor can draw power from the data line in supported circuits.
Q: Why do I read 85C?
A: 85C is a common power-up value when conversion timing or communication is incorrect.
1. General Shipping Information
- We provide reliable shipping services with a tracking number for each order.
- Shipping addresses must be entered in English and should not contain special symbols, so that the courier system can recognize your location correctly.
- Please make sure your shipping address is accurate before placing your order. We ship strictly according to the address provided at checkout.
- In-stock orders are usually dispatched within 1 business day after order confirmation.
- Estimated delivery times refer to the period after dispatch and do not include order processing time, weekends, public holidays, customs inspection, or force majeure delays.
- If you need to cancel or modify your order, please contact us before the order is marked as “Shipped”. Once shipped, the order cannot be canceled or changed.
🚀 Need Faster Shipping?
If you require expedited shipping, please contact our customer support team at info@upenelab.com for a customized quote based on your destination.
2. Shipping Rates & Options
Shipping rates are calculated based on order value, destination, and available shipping methods. The final available options will be displayed at checkout.
2.1 Germany Domestic Shipping
| Shipping Method | Order Value | Cost | Est. Delivery |
|---|---|---|---|
| Deutsche Post | €0.00 - €50.00 | €4.95 | 2-4 Business Days |
| Deutsche Post | Over €50.00 | Free | 2-4 Business Days |
|
DHL Paket (Faster Delivery) |
€0.00 - €50.00 | €6.95 | 1-3 Business Days |
|
DHL Paket (Faster Delivery) |
€50.00 - €100.00 | €2.00 | 1-3 Business Days |
|
DHL Paket (Faster Delivery) |
Over €100.00 | Free | 1-3 Business Days |
2.2 Selected EU Countries / Regions
Available EU shipping destinations are shown at checkout based on your shipping address. For orders shipped to selected EU countries or regions outside Germany, we use FedEx Regional Economy.
| Shipping Method | Order Value | Cost | Est. Delivery |
|---|---|---|---|
| FedEx Regional Economy | €0.00 - €100.00 | €7.95 | 3-5 Business Days |
| FedEx Regional Economy | Over €100.00 | Free | 3-5 Business Days |
EU orders may be fulfilled from our Munich warehouse or, when applicable, from our Shenzhen warehouse depending on inventory availability. For EU member states, OpenELAB covers applicable import duties and taxes under DDP service where required.
2.3 United States
| Region | Shipping Method | Order Value | Cost | Est. Delivery |
|---|---|---|---|---|
|
Continental U.S. (50 States) |
USPS Ground Advantage | €0.00 - €45.00 | €4.95 | 3-7 Business Days |
| USPS Ground Advantage | Over €45.00 | Free | 3-7 Business Days | |
| USPS Priority Mail | €0.00 - €45.00 | €16.95 | 1-4 Business Days | |
| USPS Priority Mail | Over €45.00 | €14.95 | 1-4 Business Days | |
|
Non-Continental U.S. (AK, HI, PR, etc.) |
USPS Ground Advantage | €0.00 - €60.00 | €6.95 | 5-9 Business Days |
| USPS Ground Advantage | Over €60.00 | Free | 5-9 Business Days |
Non-Continental U.S. regions include Alaska, American Samoa, Guam, Hawaii, the Marshall Islands, the Northern Mariana Islands, Palau, Puerto Rico, the U.S. Virgin Islands, and U.S. Armed Forces addresses.
2.4 International Destinations Outside the EU
For selected international destinations outside the EU, including Switzerland, the United Kingdom, and Norway, shipping rates are as follows:
| Order Amount | Shipping Cost |
|---|---|
| €0.00 - €300.00 | €19.95 |
| Over €300.00 | Free |
For non-EU destinations, import duties, taxes, and customs fees may be charged by the destination country and are the responsibility of the recipient.
3. Warehouses & Fulfillment
Our products may be stored in our Munich, Arlington, and Shenzhen warehouses. The actual shipping warehouse depends on product availability and destination.
3.1 Munich Warehouse
For products stored in our Munich warehouse, we use Deutsche Post or DHL Paket for domestic deliveries within Germany. For selected EU destinations outside Germany, we use FedEx Regional Economy.
3.2 Arlington Warehouse
For products stored in our Arlington warehouse, we use USPS or UPS for deliveries within the United States.
3.3 Shenzhen Warehouse
For pre-order items or products fulfilled directly from our Shenzhen warehouse, we arrange reliable international shipping based on destination and inventory status. For EU member states, OpenELAB covers applicable import duties and taxes under DDP service where required.
4. Inventory, Pre-orders & Split Shipments
- Inventory Status: Please check the product page for real-time stock information. If an item is out of stock in our local warehouses, it may be marked as “Pre-order”.
- Pre-order Fulfillment: Pre-order items may be shipped directly from Shenzhen or restocked to a local warehouse first before final delivery.
- Split Shipments: If your order contains both in-stock and pre-order items, we may ship them separately. No additional shipping fee will be charged for split shipments caused by our fulfillment arrangement.
5. Customs, Taxes & Delivery Issues
5.1 Customs and Taxes
For EU Member States:
Whether shipped from Germany or China, OpenELAB covers applicable import duties and taxes under DDP service where required. Customers in EU member states should not be charged additional import duties or VAT upon delivery.
For destinations outside the European Union, such as Switzerland, Norway, and the United Kingdom, import duties, taxes, and customs fees may be charged by local authorities upon delivery. These fees are the responsibility of the recipient.
5.2 Damaged, Delayed, or Lost Parcels
Please inspect your parcel upon delivery where possible. If you notice visible damage, please report it to the courier and contact us as soon as possible. This does not affect your statutory consumer rights.
If your parcel is delayed, lost, returned to sender, or the tracking information has not updated for an unusual period of time, please contact us at info@upenelab.com. We will assist you in checking the shipment status with the courier.
5.3 Incorrect Address or Failed Delivery
If a parcel cannot be delivered due to an incorrect or incomplete address provided by the customer, refusal of delivery, or failure to collect the parcel, additional shipping or return costs may apply.
6. VAT
For orders within the EU, VAT is collected at checkout according to the applicable destination rules. No additional VAT should be collected upon delivery for EU member state orders covered under our DDP shipping arrangement.









