• Small size, light weight & large memory capacity
• High resolution
• Non-volatile flash memory
• Built-in calendar/time information
• No PC interface required
• Programmable calibration factors
• Sensor wiper function
• Proprietary cosine photo quantum sensor
• Titanium housing
• Easy-to-use data acquisition software (Windows version)

Compact-LW is a miniature and precision water-quality data logger with a micro-controller suitable for long-term deployment. Our updated state-of-the-art technology allows for a compact design capable of storing up to 179,178 sets of 2-channel data consisting of photo quantum and battery voltage.
The memory media, non-volatile flash memory IC's, protect data loss resulting from irregular battery voltage. This feature improves reliability.
Photo quantum sensor is developed by us and has the superior multi-spectral sensitivity characteristic and cosine characteristic.
A wiper keeps the sensor surface clean, which allows for up to one- month of continuous deployment.
Compact-LW is controlled through the PC serial port, RS-232C. The main unit records calendar and time information with each sample and the sensor's calibration coefficients are stored in the built-in memory. The basic measurement setup requires only the selections of the start time and the sampling interval.
The data transfer after the completion of the deployment is easily accomplished. Information, such as measurement start time and calibration coefficients are transferred together with the measured data.
The data processing program offers clear and logical screens for easy operation.
For profiling, AL30-CMPis available, in which depth and temperature sensors are equipped.