Differential Enthalpy

The A/ENT-CTRL and A/ENT-DIFF are low cost Enthalpy controllers that
measure both temperature and humidity and converts them into a sourced
relay output. The supply voltage to the A/ENT-CTRL/DIFF is common to
both the N/O or N/C contacts of the 10A Form 1C Relay. The relay is
controlled or switched by selecting the proper mode switch within the unit.
The Advanced Ceramic Technology overcomes the limitations of other
resistance-based humidity sensors that utilize water-soluble polymer
coatings. This technology enables these sensors to fully recover from
condensation and enables the sensor to maintain its accuracy over time.
Despite its accuracy, the Advanced Ceramic Technology sensor and
related circuitry is economical.
All of the A/ENT-CTRL and A/ENT-DIFF are calibrated using a NIST
Traceable temperature and humidity controlled environmental chamber.
Factory selectable calibration can be achieved for elevations of 0, 1000,
2000, 3000, 4000, 6000, 8000, and 10000 feet. Use reverse action in the
A/ENT-CTRL/DIFF unit to change the NO/NC switch action.