Temperature of water is one of its most basic properties, and many other parameters depend on temperature for accuracy. With temperature data, we can monitor thermal loading or discharge and determine changes in the thermocline, which affect the health of aquatic species and organisms. Many aquatic organisms are sensitive to high temperatures. The solubility of oxygen is lower in warmer water, thus limiting oxygen supply.

YSI measures temperature with a high-precision thermistor sensor. The resistance of the thermistor changes with temperature. The measured resistance is converted to temperature using an algorithm.

Essential Temperature Posts on the Blog

What is Affecting Your Dissolved Oxygen Measurements? Part 1 of 4

The EXO Wiped Conductivity & Temperature Sensor Helps Eliminate Biofouling

Laboratory Instruments and Electrodes for pH, ORP, ISEs and Temperature with YSI TruLab

Which Water Quality Handheld Instrument Do I Need? | We Have the Answer


Featured Temperature Products

TruLab pH 1310

Advanced laboratory Instrument for pH, mV (ORP) and temperature


Pro2030 Dissolved Oxygen and Conductivity Meter

Portable Dissolved Oxygen, Conductivity, Salinity, TDS, and Temperature Sampling Handheld Meter


TruLab pH 1110

pH/mV single channel benchtop instrument with BNC and two banana plug connectors


Pro Series Dissolved Oxygen/Temperature Field Cable

YSI 20 Cable - DO and temperature cable assembly

$312.00 - $941.25

ScienceLine Temp 135

ScienceLine Temp 135, Temperature sensor, Stainless Steel, 120 mm, 2 banana plugs, NTC 30 kOhm.


Pro10 pH Meter

Portable pH or ORP and Temperature Sampling Handheld Meter


EcoSense Temperature Probe

Temperature Probe and 1 M Cable


556 Handheld Multiparameter Instrument

Measures Dissolved Oxygen, pH, conductivity, temperature, and ORP. Meter Only.


EXO Conductivity & Temperature Smart Sensor

EXO Conductivity & Temperature Digital Smart Sensor


EcoSense EC300A Conductivity Meter

Conductivity, TDS, Salinity, Temperature. Instrument Only