DS18B20 Stainless Steel Probe
The YuzhaLink DS18B20 Stainless Steel Probe is a Wi-Fi temperature sensor for aquariums, outdoor installations, liquids and humid environments. It pairs a genuine Dallas/Maxim DS18B20 digital sensor with an Espressif ESP32-C3-MINI-1 (RISC-V) controller, and reports over 2.4 GHz Wi-Fi to the YuzhaLink App or a compatible controller. The probe is a stainless steel waterproof tube, 6 mm in diameter and 30 mm long, rated IP67 and fitted on a 120 cm cable. It measures from -55 to +125 °C, with accuracy of ±0.5 °C stated across the -10 to +85 °C band — the measuring range and the accuracy window are quoted separately here because they are not the same span. Resolution is configurable from 9 to 12 bits; the default 12-bit setting resolves 0.0625 °C and completes a conversion in 750 ms or less. One installation rule matters more than any specification on this page: only the probe and the specified section of cable may go in water. The main unit and its USB Type-C input are not waterproof and must be mounted away from the tank. Water ingress into the controller is also excluded from the warranty, which makes probe and controller placement a decision to settle before the first install rather than after it. The DS18B20 communicates over the 1-Wire bus, and every sensor carries its own 64-bit globally unique ROM code. That is what makes multi-point deployment practical — probes can be addressed individually rather than each occupying a dedicated input. The 1-Wire protocol is robust against electrical interference, but the cable length you can actually run depends on the cable itself, the wiring method and the interference present at the site, and should be verified under the conditions the sensor will run in rather than assumed from the protocol. The device ships as a single integrated unit — probe and controller in one body — in a CPE packaging bag, with no additional accessories in the box. Power is USB Type-C at 5 V DC. Warranty is 12 months.
Category: Home Aquariums
Highlights
The probe is waterproof — the controller is not
An IP67 stainless steel probe, 6 mm × 30 mm on a 120 cm cable, is rated for submersion along with the specified cable section. The main unit and its USB Type-C port are not, and mounting them away from water is a requirement rather than a recommendation.
Every sensor has its own address
Each DS18B20 carries a 64-bit globally unique ROM code on the 1-Wire bus, so multiple measurement points can be addressed individually instead of each one needing a dedicated input.
Resolution is configurable
9 to 12 bits, defaulting to 12-bit — a 0.0625 °C step with a conversion time of 750 ms or less, so the trade between resolution and sampling speed is yours to set rather than fixed in firmware.
Accuracy quoted with its window
±0.5 °C within -10 to +85 °C, inside a full measuring range of -55 to +125 °C. The two spans are stated separately because the sensor is specified to its tighter accuracy only across the narrower band.
Reads in the YuzhaLink App
The ESP32-C3-MINI-1 controller connects over 2.4 GHz Wi-Fi and reports to the YuzhaLink App or a compatible controller, powered from USB Type-C at 5 V DC.
Specifications
- Temperature sensor
- Dallas/Maxim DS18B20 (digital)
- Main controller
- ESP32-C3-MINI-1 (RISC-V)
- Measuring range
- -55 to +125 °C
- Accuracy
- ±0.5 °C (within -10 to +85 °C)
- Resolution
- 9–12 bit configurable, 12-bit default (0.0625 °C)
- Probe housing
- Stainless steel waterproof tube
- Control
- YuzhaLink App / compatible controller
- Version
- DS18B20 Stainless Steel Probe
- Sensor bus
- 1-Wire
- ROM code
- 64-bit, globally unique
- Conversion time
- ≤750 ms (12-bit)
- Ingress protection
- IP67
- Probe dimensions
- 6 mm diameter × 30 mm length
- Cable length
- 120 cm
- Submersible parts
- Probe and specified cable section only — the controller must not be submerged
- Waterproofing
- Probe only; the main unit and USB-C port are not waterproof and must be kept away from water
- Connectivity
- 2.4 GHz Wi-Fi
- Power input
- USB Type-C, 5 V DC
- Applications
- Aquarium, outdoor, liquid and humid-environment temperature monitoring
- Warranty
- 12 months