Decagon Devices VP-4 Operator's Manual page 10

VP-4
Cable Length: 5 m standard; custom cable length available upon
request
Data Logger Compatibility (not exclusive):
Decagon: Em50, Em50R, Em50G (Firmware 2.19+)
Campbell Scientific: Any logger with serial I/O (CR10X,
CR850, 1000, 3000, etc.)
Handheld Reader Compatibility: ProCheck (rev 1.57+)
Software Compatibility
ECH2O Utility (rev 1.74+)
DataTrac (rev 3.11+)
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2 ABOUT VP-4