Digital Temperature Sensor (Water/Air)

Part # 51163

digital temperature sensor compact

The Digital Temperature Sensor is ideal for high-accuracy readings in fresh/saltwater or air. SDI-12 output provides universal compatibility with any SDI-12-enabled data logger.

The Digital Temperature Sensor features fully-potted components, robust PVC Type II housing, and marine-grade stainless steel, making the sensor ideal for harsh environments.

The compact body is small enough to easily deploy through standard 1” (2.5cm) PVC conduit with 8” (20.3cm) factory bend corners. It also offers a loop hole which can be used to mount weights or pull the sensor through pipes or other small areas.

  • NIST certification available
  • High-accuracy temperature measurement
  • Extremely low current draw
  • Works in water, soil, or air
  • Compact housing that fits through standard 1” conduit with 8” factory bend corners
  • Suitable for freshwater or marine applications
  • Fully potted electronics
  • Tough PVC Type II housing
  • Celsius, Fahrenheit, and Kelvin output
  • Digital—no calibration required

Easily deployed through standard 1” PVC conduit with 8” factory bend corners*

digital temp sensor factory bend coners
digital temp sensor 1 inch pipe

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What's the Easiest and Quickest Way to Start Collecting Data and Access it Anywhere?

The Answer's in the Cloud.

eTracker is a cellular modem and "virtual" cloud-based data logger in one (meaning you don't need to install a separate data logger). Simply connect your sensor and a power source to eTracker and you're done. Configure (or reconfigure) anytime from any Internet-connected device, and use Stevens-Connect to retrieve your data, or forward it to your favorite software system.

Technical Specifications


Digital thermistor


SDI-12 v.1.3

Measurement range

-40° F to +140° F (-40° C to +60° C)


±0.18° F (±0.1° C) from 23° F to 122° F (-5° C to +50° C)
±0.2° C outside this range


0.01° C

Current draw

1.5 mA active (for 260 ms), ~30 μA quiescent


Celsius, Fahrenheit, and Kelvin


6.25” (158.7 mm) L x 0.85” (21.59 mm) Ø (model 51126)
2.83” (71.9 mm) L x 0.70” (17.8 mm) Ø (model 51163)