The Apogee EE08-SS is a customized version of the EE08 probe made by Austrian manufacturer E + E Elektronik. After years of evaluation, the EE08-SS has emerged as our sensor of choice over more expensive probes for accuracy, stability, and durability. The Apogee EE08-SS features an improved right-angle, IP67 rated, stainless-steel M12 connector; heat-reflective white cabling; and a more durable, metal-grid dust filter. These features added by Apogee only slightly increase the price over the base model from E + E, but greatly improve the performance and reduce the maintenance of the probe, especially when used with a fan-aspirated radiation shield like the Apogee TS-100.
Fan Aspiration
Fan aspiration of humidity probes can improve accuracy over passive shields. The TS-100 shield (pictured) is an excellent choice for accomplishing this and is available at a special package price when purchased together.
Typical Applications
Applications include meteorology, weather stations, hatcheries and incubators, climatic chambers, green houses, storage rooms, artificial snow machines, and battery operated devices.
Warranty and Support
The Apogee EE08-SS is backed by a 1 year warranty and outstanding customer support.
EE08-SS
Input Voltage： 7 to 30 V DC
Current Draw ： Less than 1.3 mA
Start-up Time： 2 s
Housing： Polycarbonate, IP65
Filter： Stainless steel wire mesh, 30 micron pore size
Connector： M12, IP67
Dimensions： 83 mm length, 12 mm diameter
Mass with 5 m Cable： 270 g
Operating Environment： -40 to 80 C; 0 to 100 % relative humidity
Cable： M12 connector (IP67 rating) to interface to sensor housing, 5 m of four conductor, shielded, twisted-pair wire (10 m and 20 m cables also available), white TPR jacket (high water resistance, high UV stability, flexibility in cold conditions), pigtail lead wires
Warranty ： 1 year against defects in materials and workmanship
Temperature Measurement
Sensor： PT1000 (Class A)
Measurement Range： -40 to 80 C
Output Signal Range： 0 to 2.5 V DC
Accuracy at 20 C： ± 0.2 C
Long-term Stability： Less than 0.1 C per year
Time Constant： Less than 30 s
Relative Humidity Measurement
Sensor： Capacitance Chip
Measurement Range： 0 to 100 %
Output Signal Range： 0 to 2.5 V DC
Accuracy at 20 C： ± 2 % from 0 to 90 %; ± 3 % from 90 to 100 %
Temperature Response： Less than -0.05 % per C
Long-term Stability： Less than1 % per year
Time Constant： Less than 30 s
TS-100 Utah State University
The Department of Plants, Soils, & Climate at Utah State University maintains a solar powered weather observatory on campus using both an Apogee TS-100 aspirated shield and a standard static shield to monitor air temperature. A real-time graph on the site illustrates errors that can occur with static shields in certain conditions.
