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Sangamo Astro Zone 1 4-Pin Time Switch 1 On/Off Optional Early Off - 20A

£22899
The RRP is the manufacturer's recommended retail price of the item.
78 In Stock - Ready to Ship
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Description

The Sangamo Astro Zone 1 is a 4-pin astronomical time switch with a 20A rating, designed to control lighting and heating circuits based on sunrise and sunset times for Zone 1 geographical locations. The unit programmes one on/off operation per 24-hour cycle, with an optional early-off function that allows the circuit to switch off before the scheduled sunset time if required.

Designed for installation in domestic and commercial consumer units, the time switch fits standard DIN rail mounting and automates control of outdoor lighting, security lighting, street lighting and heating circuits without requiring manual adjustment through the seasons. The astronomical function calculates sunrise and sunset times based on the Zone 1 latitude setting, which covers the UK and similar northern European latitudes. The 100-hour battery reserve maintains programming and timekeeping during mains power interruptions.

The mechanical dial face shows a 24-hour scale with red graduations, and the central nut adjusts the timing offset. Three brass terminal clips on the grey metal housing connect to the incoming supply and outgoing load circuit. The clear polycarbonate cover protects the mechanism and allows visual confirmation of the current programme position. The unit measures 104mm × 83mm × 134mm and weighs 425g, making it one of the larger electromechanical timers in the Sangamo range.

Specification
Product Net Weight (KG) 0.425
Product Gross Weight (KG) 0.469
Outer Gross Weight (KG) 0.42
Product Length (mm) 104
Product Width (mm) 83
Product Height (mm) 134
Outer Length (mm) 104
Outer Width (mm) 83
Outer Height (mm) 134
Downloads

Product Specification Sheet

Product Manual

Frequently Asked

What is an astronomical time switch?

An astronomical time switch calculates sunrise and sunset times based on latitude and date, then switches circuits on and off relative to those times. This means outdoor lighting automatically adjusts through the year without manual reprogramming as daylight hours change with the seasons.

What is Zone 1?

Zone 1 refers to a latitude band covering the UK, Ireland and similar northern European locations between approximately 50-58 degrees north. Sangamo astronomical timers are calibrated for specific zones to ensure accurate sunrise/sunset calculation for the installation location.

What does the early-off function do?

The optional early-off function allows the time switch to turn the circuit off before the calculated sunset time. This is useful for security lighting that only needs to operate during the darkest hours rather than from dusk to dawn, reducing energy consumption.

What is the 100-hour battery reserve?

The internal battery maintains the time switch's programming and timekeeping for up to 100 hours during mains power cuts. This prevents the programme resetting to factory defaults after brief power interruptions, which would otherwise require reprogramming.

Shipping & Returns

Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

To arrange a return, call us on 020 8149 5199 or use our contact page.

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Fits standard UK back boxes

Designed to fit standard UK back boxes for a straightforward swap of your existing fittings.

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Free delivery on orders over £99, in the UK and worldwide. Easy returns within 14 days, subject to our returns policy. Full manufacturer warranty included.

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    Description

    The Sangamo Astro Zone 1 is a 4-pin astronomical time switch with a 20A rating, designed to control lighting and heating circuits based on sunrise and sunset times for Zone 1 geographical locations. The unit programmes one on/off operation per 24-hour cycle, with an optional early-off function that allows the circuit to switch off before the scheduled sunset time if required.

    Designed for installation in domestic and commercial consumer units, the time switch fits standard DIN rail mounting and automates control of outdoor lighting, security lighting, street lighting and heating circuits without requiring manual adjustment through the seasons. The astronomical function calculates sunrise and sunset times based on the Zone 1 latitude setting, which covers the UK and similar northern European latitudes. The 100-hour battery reserve maintains programming and timekeeping during mains power interruptions.

    The mechanical dial face shows a 24-hour scale with red graduations, and the central nut adjusts the timing offset. Three brass terminal clips on the grey metal housing connect to the incoming supply and outgoing load circuit. The clear polycarbonate cover protects the mechanism and allows visual confirmation of the current programme position. The unit measures 104mm × 83mm × 134mm and weighs 425g, making it one of the larger electromechanical timers in the Sangamo range.

    Specification
    Product Net Weight (KG) 0.425
    Product Gross Weight (KG) 0.469
    Outer Gross Weight (KG) 0.42
    Product Length (mm) 104
    Product Width (mm) 83
    Product Height (mm) 134
    Outer Length (mm) 104
    Outer Width (mm) 83
    Outer Height (mm) 134
    Downloads

    Product Specification Sheet

    Product Manual

    Frequently Asked

    What is an astronomical time switch?

    An astronomical time switch calculates sunrise and sunset times based on latitude and date, then switches circuits on and off relative to those times. This means outdoor lighting automatically adjusts through the year without manual reprogramming as daylight hours change with the seasons.

    What is Zone 1?

    Zone 1 refers to a latitude band covering the UK, Ireland and similar northern European locations between approximately 50-58 degrees north. Sangamo astronomical timers are calibrated for specific zones to ensure accurate sunrise/sunset calculation for the installation location.

    What does the early-off function do?

    The optional early-off function allows the time switch to turn the circuit off before the calculated sunset time. This is useful for security lighting that only needs to operate during the darkest hours rather than from dusk to dawn, reducing energy consumption.

    What is the 100-hour battery reserve?

    The internal battery maintains the time switch's programming and timekeeping for up to 100 hours during mains power cuts. This prevents the programme resetting to factory defaults after brief power interruptions, which would otherwise require reprogramming.

    Shipping & Returns

    Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

    Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

    To arrange a return, call us on 020 8149 5199 or use our contact page.