The DL6 is a dedicated soil moisture logger optimized for use with soil moisture sensors. It can be used with combinations of ThetaProbes and Profile Probes and also accepts rain gauge and soil temperature probe inputs. It is well suited to both research applications and irrigation monitoring.

DL6 Loggers include a novel accelerated logging feature to allow the tracking of wetting fronts.

As you would expect from Dynamax, the DL6 is tough and passes a 1m drop test. It is environmentally sealed (IP68) and can be used in the field without any further protection. To minimize the need for opening the case, data is collected via a weatherproof external RS-232 socket, and the status of the logger can be checked using a vibration-activated LED.


  • Ideal for Profile Probes, ThetaProbes and SM150T sensors
  • 8 channel logger with weather-proof case and battery power
  • Free use of DeltaLINK-Cloud data sharing service
Input connections -6 voltage channels
1 temperature
1 counter
Control outputs 1 relay (2A)
Readings stored 16,000
Recording rate 1 second to 24 hours
Configuration DeltaLINK
Communication options RS232, USB[1] or modem
Sensor excitation 1 switched logger power
Power 6 AA alkaline batteries
Battery life (dependent on usage) ~ 1 year
Enclosure rating IP67
Temperature range -10 to +50° C
Size 7" x 6.3" x 2.75" (180 x 160 x 70 mm)
Typical applications Monitoring soil moisture profiles
Controlling irrigation
[1] With USB to RS232 Adapter Cable type USB-RS232
ML3 (1) with temp (5) excl. temp
SM150T (1) with temp (5) excl. temp
PR2 (1)
PR2 SDI-12 -
WET Sensor -
EQ3 (6 as mV only)
Temperature (1)
Tensiometers -
Counters or Events (1)
Relay Output (1)

Maximum number of sensors that could be connected with appropriate expansion cards and power supply arrangements.