YSI ProDSS Total Algae Sensor

The YSI ProDSS total algae sensor is a digital smart sensor for helping monitor, mitigate, and manage the impacts of harmful algal blooms.


  • Dual channel sensor
  • Measures and outputs both chlorophyll & blue-green algae
  • Options for ug/L and RFU outputs
List Price $3,525.00
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The Total Algae (TAL) sensors are dual-channel fluorescence sensors. The “channels” are for chlorophyll and phycocyanin (TAL-PC), or chlorophyll and phycoerythrin (TAL-PE), which are measured in the water. Each sensor thus yields two data sets: for TAL-PC, one results from a blue-emitting LED that excites the chlorophyll a (chl) molecule and the second results from an orange excitation beam that excites the phycocyanin (PC) accessory pigment. The TAL-PE sensor is similar, also having the chlorophyll channel, but rather than an orange-emitting LED there is a slightly blue-shifted beam that excites phycoerythrin (PE).

The TAL sensors generate data in RFU or μg/L of pigment (chl, PC or PE) units, with RFU as the default. When using either RFU or μg/L, the sensor’s response is highly linear: a reading of 50 of either unit represents twice as much fluorescence detected as a reading of 25, for example, if the temperature is constant.

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YSI ProDSS Total Algae Sensor
ProDSS freshwater total algae sensor (chlorophyll & phycocyanin)
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YSI ProDSS Total Algae Sensor
ProDSS saltwater total algae sensor (chlorophyll & phycoerythrin)
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