Chapter 1: Introduction
2 HOBO Energy Logger Pro User’s Guide
FlexSmart modules
The logger is compatible with two types of FlexSmart modules, which can accommodate up to two sensors each. Up
to three FlexSmart modules (in any combination) can be connected to the logger.
The Analog Module (S-FS-CVIA) offers configurable excitation power and can be connected to any one or two of
the following sensors:
• Kilowatt (kW) Power (T-VER-8044-100)
• Gauge Pressure (T-ASH-G2)
• Differential Air Pressure (T-SET-265)
• Carbon Dioxide/Temperature (TEL-7001)
• Duct-Mount Humidity/Temperature (T-VAI-HMD-40Y)
• Additional third-party sensors via 4-20mA, or 0-20 V DC (including 2.5, 5, 10 V)
The TRMS Module (S-FS-TRMSA) can be connected to the following compatible AC current and potential
(voltage) transformers:
• AC Current (with 333 mV output) (T-MAG-SCT)
• AC Voltage (with 333 mV output) (T-MAG-SPT)
For detailed information on these modules and sensors, including new modules and sensors that may have been
introduced after this manual was printed, refer to the Onset website:
http://www.onsetcomp.com/solutions/products/energy
Smart Sensors
The Energy Logger Pro can also accommodate up to six Smart Sensors to monitor temperature, humidity, pressure,
current, voltage, pulses, and other properties. Smart Sensors are automatically detected when logging begins, and do
not require any configuration.
For detailed information on Smart Sensors, including new sensors that may have been introduced after this manual
was printed, refer to the Onset website: http://www.onsetcomp.com/solutions/products/sensors/smart