
The AUTOSTAT is a true fully automatic humidity controller - it is user friendly and requires no user setup at all. It can control both kitchen and bathroom fans to ensure that they run only when required, providing 10 years proven condensation control for the home.
The Autostat IV is an intelligent,
microprocessor driven controller,
which unlike conventional
humidistats is based on a
determination of absolute
humidity, not relative humidity.
The important difference
between the two is that absolute
humidity is not affected by the
temperature of the surrounding
environment, making the
Autostat perfectly suited to
environments with widely
fluctuating air moisture content,
and temperature/condensation“noise” (kitchens, laundry rooms,
shower & bathroom).
By way of example, cooking and
tumble dryers produce copious
amounts of water vapour,
however a local RH% controller
would register only a slight
increase in RH% due to a
simultaneous increase in
temperature causing the air to
hold more moisture (See graph
below, click to enlarge). Increased ventilation
would therefore not be triggered.
The Autostat would however
identify a change in the moisture
content of the air and react
accordingly.

Autostat IV Operation: The Autostat samples the surrounding environment at regular intervals, stores and averages the results over the previous two hours and uses this as a reference base of humidity for the next two hours. When the measured humidity exceeds this reference base by a predetermined amount the controller triggers action, as illustrated in the graph to the right.
Autostat IV Features: Autostat IV is pre programmed at the factory and should require no adjustment through its lifetime. The units operate on 240V AC and 12V AC/DC and provide output control through relay load output position 1. · Integral override on pull switch · Remote override on · Light switch trigger with proportional on time hold · Voltage free output control with switch over relay · On board program header, with Autostat IV programming software available from website · Link settings for 12/240v ac or voltage free relay (items factory set) · Autostat IV spreadsheet to generate custom graphs on downloaded log data · Tri-coloured LED Status indicator · Extensive User Manual, covering all Autostat IV software and Autostat operations available for download on request.
Product catalogue codes:
Autostat-IV-12V 12V Autostat IV humidity controller, data log, overrun timer
Autostat-IV-12VP 12V Autostat IV humidity controller, data log, pull cord override
Autostat-IV-240V 240V Autostat IV humidity controller, data log, overrun timer
Autostat-IV-240VP 240V Autostat IV humidity controller, data log, pull cord override
Autostat technical data:
Dimensions: 85mm x 85mm x 25mm
Patent: 2316188 (UK), 6230980B1 (US), H10-509502 (Japan), 0917677 (Ireland) and International Patent PC/GB97/02155
Warranty: Two-year replacement warranty. For Local Authorities and Housing Associations we offer a 'two-part' guarantee: in addition to two year warranty during the second year of the warranty period we offer an RHL site visit to replace any faulty equipment. |