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This high-accuracy, fast-response temperature sensor comes sealed and ready to use for temperature profiling, lab measurements, and more!

Available on backorder

SKU: 01-03-001 Categories: ,

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The Celsius temperature sensor is a fast-response, high-accuracy temperature sensor that is sealed from the water, protected by an aluminum cage, and ready to install in a watertight enclosure. Use it to make depth/temperature profiles, surface temperature profiles, and accurate measurements in any fluid.

The sensor is the Measurement Specialties TSYS01, which is accurate to ±0.1°C and communicates over I2C. It comes standard with a 4-pin DF13 connector and compatible with most DroneCode compatible boards including the APM2.6, PixHawk, and others.

The TSYS01 sensor itself has a fast time response and we designed the whole package to maintain that speed to allow accurate temperature profile measurements even while descending/ascending quickly. The Celsius sensor has a response time constant of 1 second (with 0.5 m/s flow) and 2 seconds (in still water).

An anodized aluminum cage around the sensor protects it from damage. The body of the sensor is designed around the cable penetrator design and is compatible with all of the watertight enclosures.

The electrical schematic and board layout are open-source and the design files are available below. Feel free to adapt for your own needs.


Parameter Value
Supply Voltage 3.3 to 5.5 volts
I2C Logic Voltage (SDA and SCL) 3.3 volts
Peak Current 1.4 mA
Mating Connector  Hirose 4-pos DF13 available on Digi-Key
Operating Temperature -40 to +125°C -40 to 257°F
Storage Temperature -55 to +150°C -67 to 302°F
Absolute Accuracy +/- 0.1°C (when used between -5 to 50°C) +/- 0.18°F
+/- 0.5°C (when used between -40 to 125°C) +/- 0.9°F
Recommended Through Hole Size 10.2 mm 13/32″

2D Drawings

Celsius 2D


  • 1 x Celsius Temperature Sensor
  • 1 x O-ring
  • 1 x Nut


Additional information

Weight 0.02 kg
Dimensions 5.6 × 1.9 × 19 cm


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