A3-style DS18B20-compatible waterproof temperature probe with 1 m cable

A3-Style DS18B20-Compatible Waterproof Temperature Probe

1m
$4.29 NZD
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A3-style DS18B20-compatible waterproof temperature probe with 1 m cable
  • A3-style DS18B20-compatible waterproof temperature probe with 1 m cable
  • A3-style DS18B20-compatible waterproof temperature probe submerged in water
  • A3-style DS18B20-compatible metal probe tip diameter measurement
  • A3-style DS18B20-compatible probe red, yellow and black bare wire ends
  • A3-style DS18B20-compatible metal probe tip length measurement
A3-Style DS18B20-Compatible Waterproof Temperature Probe
SKU: NZE-DS18B20-1M

A3-Style DS18B20-Compatible Waterproof Temperature Probe

$4.29 NZD
4.0 1 review
7 bought this month
Cable length
Dispatch: Within 24 hours 7-day dispatch, excluding public holidays

NZ Post: 1-2 days urban · 2-4 days rural

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A sealed, A3-style DS18B20-compatible digital temperature sensor probe for Arduino, ESP32, Raspberry Pi and other 1-Wire projects. NZN testing confirmed the A3-style implementation in the current 1 m and 3 m probes. The 5 m option comes from the same manufacturer as the tested 3 m version, but NZN has not independently characterised its internal implementation.

Specifications

InterfaceDigital 1-Wire
Supply3.0 V to 5.5 V
Resolution9 to 12 bit
Cable options1 m, 3 m or 5 m
ConnectionRed VCC, yellow DATA, black GND
DATA pull-up4.7 kOhm recommended
Sensor identityA3-style DS18B20-compatible
NZN sample QC1 m and 3 m passed extended protocol and stability testing
Ice-point resultAbout -0.12°C (1 m) and -0.27°C (3 m) average

Datasheets

Technical datasheetPDF Quick Start guidePDF

What's in the box

1
A3-style DS18B20-compatible temperature probeSelected cable length with bare wire ends

Great for

Aquariums and water tanks
Brewing and fermentation
Hydroponics and greenhouses
HVAC and refrigeration projects
ESPHome and Home Assistant
Arduino, ESP32 and Raspberry Pi

Wiring & getting started

  1. Connect power

    Red to 3.3 V or 5 V, and black to GND.

  2. Connect DATA

    Yellow to a GPIO, with a 4.7 kOhm resistor from DATA to VCC.

  3. Use a fixed conversion wait

    The tested 1 m and 3 m samples show an A3-style conversion-polling quirk. At 12 bit, allow the full 750 ms before reading.

  4. Check each reading

    Reject failed CRC data. An 85 degrees C value immediately after power-up usually means the first conversion was not complete.

Note: A3-style is an independent behavioural family label, not a manufacturer or official part number. NZN confirmed the A3-style fingerprint in tested 1 m and 3 m samples. The 5 m option comes from the same manufacturer as the tested 3 m version, but NZN has not independently characterised its internal implementation. In nominal 0.0°C ice-water slurry tests, the 1 m probe averaged about -0.12°C and the 3 m probe about -0.27°C. Each had only 0.0625°C total spread over about 110 seconds, showing good practical ice-point accuracy and excellent repeatability. This does not verify ±0.5°C accuracy across -10°C to +85°C.
Related guide DHT22 vs DS18B20 vs BMP280: Which Sensor Should You Choose?Choose a sensor for air temperature, humidity, remote temperature or pressure. Compare DHT22, DS18B20 and BMP280, with practical wiring and placement checks.

Frequently Asked Questions

Answers to the questions buyers ask most.

Which cable length should I choose?
Choose 1 m for nearby controllers, 3 m for tanks or equipment with more separation, or 5 m when the controller must be farther away. The current NZN ice-point characterisation covered the 1 m and 3 m samples only.
Do I need a pull-up resistor?
Yes. Fit a 4.7 kOhm resistor between DATA and VCC near the controller for a typical single-probe setup.
Why should I use a fixed conversion wait?
The tested 1 m and 3 m probes use an A3-style compatible implementation that can report HIGH during early conversion checks. Use a fixed wait of 94 ms at 9 bit, 188 ms at 10 bit, 375 ms at 11 bit, or 750 ms at 12 bit. With the DallasTemperature library, call setCheckForConversion(false).
Can several probes share one data pin?
Yes. Each probe has a unique 64-bit ROM address, so multiple compatible sensors can share one 1-Wire bus when wiring and pull-up strength are suitable.
How accurate are these probes?
In a nominal 0.0 degrees C ice-water slurry, the tested 1 m sample averaged about -0.12 degrees C and the 3 m sample about -0.27 degrees C. Each varied by only 0.0625 degrees C over about 110 seconds. This shows good practical ice-point accuracy and excellent repeatability for those samples, but NZN has not verified +/-0.5 degrees C across the full -10 degrees C to +85 degrees C range.

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Why Buy from NZN

Useful parts, fair prices and someone local to help.

I'm Lukas, an engineering student and maker based in Te Awamutu. NZN grew out of a CNC build that dragged on for months because every missing cable, bolt or electronic part meant another overseas order. I started the shop so Kiwi makers can spend more time building and less time waiting for the next parcel.

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