This is a heavy-duty, highly accurate device for controlling humidity in the growing environment. Because this unit keys off of relative humidity (rH), the ESHSP requires a more intensive initial setup than the ESHS; the unit must be initially calibrated to precise ambient humidity using a highly accurate tool such as our Digital Psychrometer. Once calibrated, the ESHSP provides superior control over humidity with an incredible accuracy of ± 1%, in optimal operating range of 20 - 95% rH. Unlike the ESHS which must be situated in an air duct for maximum accuracy, the ESHSP can be placed nearly anywhere in the grow room. Encased in a durable metal housing, these units have been known to operate for over 20 years in extreme conditions without failing! Comes ready to wire with built-in wall-mountable junction box. Rated at 10 amps. Should be used in conjunction with the E-SHSRE Humidistat Relay when used to operate FP's 1⁄2 or 1 HP Turbo Humidifans.
Please note: because of the shipping dimensions of this item, we are not able to provide accurate shipping calculations online. When you place an order for this product online, before your order is processed, a Customer Service Representative will contact you with a quotation on shipping.