The ST-150 is a 1/8 inch, Class A PRT (Platinum Resistance Thermometer) with an IP67 rating. White heat shrink is used on the cable behind the PRT to minimize heat transfer to the sensor. PRT sheath dimensions are 3 mm diameter and 65 mm length, miminzing thermal mass.
Alternatively, see the Apogee ST-300: A high accuracy PRT (Platinum Resistance Thermometer),(1/10 DIN) designed to minimize solar load and thermal mass. White heat shrink is used on the cable behind the PRT to reduce solar load. PRT sheath dimensions are 3.18 mm diameter and 63.5 mm length, minimizing thermal mass.
Warranty and Support: All Apogee products are backed by an industry-leading four year warranty and outstanding customer support.
The Apogee ST-150 PRT is available in a preconfigured IoT (Internet of Things) setup for continuous real-time solar energy for continuous photovoltaic performance monitoring.
|Measurement Range||-60 to 80 C||-60 to 80 C|
|Measurement Uncertainty||0.3 C (-50 to 70 C), Class A||0.1 C (-60 to 60 C), 1/10 DIN|
|Long-term Drift (Non-stability)||Less than 0.05 C per year||Less than 0.05 C per year|
|Time Constant (time for detector signal to reach 63 % following a step change)||32 s||32 s|
|Self-heating||Less than 0.003 C (typical, assuming pulsed excitation of 2.1 V DC)||Less than 0.003 C (typical, assuming pulsed excitation of 2.1 V DC)|
|Operating Environment||-60 to 80 C; 0 to 100 % relative humidity||-60 to 80 C; 0 to 100 % relative humidity|
|Resistance at 0 C||100 Ω||–|
|Input Voltage Requirement||Datalogger dependent||2.1 V DC|
|Output Voltage Requirement||Datalogger dependent||16 to 27 mV DC (excitation of 2.1 V DC)|
|Current Draw||Datalogger dependent||0.21 mA DC (maximum, with steady excitation of 2.1 V DC)|
|Dimensions||57.15 mm length, 3.18 mm diameter||57.15 mm length, 3.18 mm diameter|
|Mass||95 g||95 g|