Timeguard 24hr Compact Immersion Time Switch - NTT01 has a rating of 4.9 stars based on 10 reviews.

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Timeguard 24hr Compact Immersion Time Switch - NTT01

Quick Find Code: NTT01

3 Year Warranty

Free Next Day Delivery on orders over £50*

for Next Working Day Delivery

Full 24-hour schedule — 4 ON / 4 OFF events daily
16A relay supports immersion and resistive loads
Self-cancelling override for temporary bypass
Automatic summer/winter clock adjustment included
Retains programming for ~100 hours during power cuts

Timeguard 24hr Compact Immersion Time Switch - NTT01

Quick Find Code: NTT01

3 Year Warranty

Free Next Day Delivery on orders over £50*

for Next Working Day Delivery

Full 24-hour schedule — 4 ON / 4 OFF events daily
16A relay supports immersion and resistive loads
Self-cancelling override for temporary bypass
Automatic summer/winter clock adjustment included
Retains programming for ~100 hours during power cuts

Regular price ~~£26.93~~
£17.95 (inc. VAT)

Regular price ~~£22.44~~
£14.96 (ex. VAT)

You save: £8.98

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IN STOCK

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Product

Status

Price

Qty

Timeguard 24hr Compact Immersion Time Switch - NTT01

NTT01Current Product

In Stock

£17.95

(inc. VAT)

Attribute Value

Timeguard 24hr Compact General Purpose Timeswitch With Volt Free Contacts - NTT02

NTT02

In Stock

£19.95

(inc. VAT)

Attribute Value

Timeguard 24hr / 7 day Compact Electronic Immersion Time Switch - NTT03

NTT03

In Stock

£28.65

(inc. VAT)

Attribute Value

Timeguard 7 day Slimline General Purpose / Immersion Timeswitch - NTT07

NTT07

In Stock

£31.79

(inc. VAT)

Attribute Value

Timeguard 7 day Slimline Electronic Immersion Time Switch - NTT08

NTT08

In Stock

£28.85

(inc. VAT)

Attribute Value

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Information & Specification
Delivery Information

Product Overview

Timeguard 24hr Compact Immersion Time Switch - NTT01

The Timeguard NTT01 is a compact and efficient 24-hour electronic immersion heater timeswitch ideal for regulating hot water systems on a daily schedule. Operating on a 230 V AC / 50 Hz supply, it allows users to set up to 4 ON / 4 OFF switching periods per 24-hour cycle, giving flexibility to match hot water usage throughout the day. Its design supports both daily repeat mode and manual override, making it perfect for daily household routines or variable heating needs.

Designed for accessibility and ease of use, the NTT01 features a clear backlit display and intuitive button layout for programming. A self-cancelling override allows the heater to be temporarily bypassed and return to the programmed time at the next interval. The unit is built for both flush and surface mounting and fits within a standard wall box (with a minimum depth of approx. 32 mm). Its compact dimensions make it unobtrusive yet effective in a variety of installation locations.

With an internal relay rated at 16A (resistive loads), the NTT01 is capable of controlling immersion heaters, as well as other resistive appliances. It includes automatic summer/winter time adjustment, which ensures the times remain accurate as the clocks change, and a memory feature that retains programming for up to 100 hours during power interruptions. The combination of flexibility, reliability, and ease of installation makes the NTT01 a dependable choice for daily immersion control.

Downloads

Download ntt01-instructions

Specification

24 Hour Digital Clock	No
Battery Backup	Yes
Battery Rechargeable	Yes
Gang	1
MPN	NTT01
Old GTIN	05012483012291
Operating Temperature Maximum	40 °C
Operating Temperature Minimum	-20 °C
Shortest Switching Time	15 min
Timer Mode	24 Hour
Voltage	230 V
Depth	60 mm
Height	92 mm
Width	92 mm

We always aim to dispatch your order for delivery on the next working day. Simply place your order before the same-day dispatch cut-off time. The countdown timer on the product page shows this cut-off time. While we work with trusted couriers, delivery times cannot be guaranteed.

Free UK Delivery on All Qualifying Orders Over £50. Orders under £50 will incur a £5.90 Delivery Fee.

This Excludes Delivery to the Scottish Highlands, Offshore Islands and Northern Ireland. These will be charged at an extra rate, which will be calculated at the checkout.

Heavier Items may also incur an extra fee.

Compare the range

Operating temperature maximum

40 °C

Operating temperature minimum

-20 °C

Timer

Timer mode

24 Hour

Voltage

230 V

24 hour digital clock

Battery backup

Battery rechargeable

Estimated battery life

Gang

Shortest switching time

15 min

Thermostat

Child lock

Current

Digital controls

Finish or colour

Ip rating

Material

Mounting

Smart home compatible

Wired

NTT02

£19.95

50 °C

-10 °C

24 Hour

230 V

NTT03

£28.65

40 °C

-20 °C

24 Hour/7 Day

230 V

720 h

1 min

NTT07

£31.79

40 °C

0 °C

230 V

White

IP20

Polycarbonate

Surface

NTT08

£28.85

40 °C

0 °C

7 Day

230 V

720 h

1 min

White

Plastic

Timeguard 24hr Compact Immersion Time Switch - NTT01

Information & Specification