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Home
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Digital Controllers
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Options
> HPAL Dual Relay Extension Unit
HPAL Dual Relay Extension Unit
Provides an additional two relay outputs.
This unit can only be used with some thermostats.
See also:
HP22 Two Level Thermostat
.
HP26 Two Zone Floating Proportional Controller
.
HP47 Thermal Chamber Control
.
HP54 Four Stage Step Control
.
HD38 Six Step Ventilation Controller
.
HD40 Greenhouse Controller
.
