1. Introduction
The CS241 temperature sensor uses a precision 1000 ohm Class A platinum resistance
thermometer (PRT) to measure temperature. It is designed for measuring the back-of-
photovoltaic (PV) module temperature but also can be used to measure the surface temperature
of other devices. The CS241 can be measured with a 2-wire or 4-wire configuration and is
compatible with most Campbell Scientific data loggers.
NOTE:
This manual provides information only for CRBasic data loggers. The sensor is also
compatible with our retired Edlog data loggers. For Edlog data logger support, contact
Campbell Scientific. Support for Edlog data loggers is no longer free; see
www.campbellsci.com/news-edlog-retiring for more information.
2. Precautions
lREAD AND UNDERSTAND the Safety section at the back of this manual.
lDo not use epoxy to secure the sensor head to a PV module.
lBefore mounting, the installers need to wash their hands and then clean the back of the PV
module or other device using the isopropyl alcohol pad shipped with the sensor.
lPrying the sensor head off will likely damage both the sensor and PV module.
lProper strain relief of the cable is required after mounting the sensor to the measurement
surface (Mounting/cable strain relief (p. 13)).
lPlacement of the cable inside a rugged conduit is advisable for cable runs over 4.5 m (15 ft),
especially in locations subject to digging, mowing, traffic, power tools, animals, or lightning
strikes.
3. Initial inspection
lUpon receipt of the sensor, inspect the packaging and contents for damage. File damage
claims with the shipping company.
CS241 PT-1000 Class A, Back-of-Module Temperature Sensor1
