ZeroDew ZeroDew dew heater bands

Resistance, Power & Length Values

Reference values for all ZeroDew band sizes — resistance, operating current, power consumption, and physical length for each telescope or accessory size.

Band size Resistance Current Power Length
50mm finder32 Ω0.37 A4.5 W19 cm
80mm finder20 Ω0.60 A7.2 W29 cm
2″ eyepiece32 Ω0.37 A4.5 W21 cm
80mm17.5 Ω0.68 A8.2 W32 cm
100/110mm OTA14 Ω0.86 A10.3 W41 cm
120/125mm OTA12 Ω1 A12 W47 cm
6″ OTA8 Ω1.5 A18 W64 cm
7/8″ OTA7.6 Ω1.6 A19 W74 cm
9/10″ OTA6.2 Ω1.9 A23 W94 cm
11/12″ OTA5.5 Ω2.2 A26 W109 cm
14″ OTA5.0 Ω2.4 A28 W127 cm
16″ OTA4.4 Ω2.7 A33 W142 cm

Values are measured at 12 V DC supply voltage. Current and power will scale proportionally with supply voltage. Resistance values are fixed by the band construction and do not vary with temperature.

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