---
product_id: 60410390
title: "Optimum OP-IHTGPT 24 Hour Immersion/General Purpose Time Switch, 230 V, White"
brand: "optimum"
price: "$103"
currency: NZD
in_stock: false
reviews_count: 8
url: https://www.desertcart.nz/products/60410390-optimum-op-ihtgpt-24-hour-immersion-general-purpose-time-switch
store_origin: NZ
region: New Zealand
---

# 24-hour precision timing 16A resistive / 8A inductive load capacity Surface mount with easy installation Optimum OP-IHTGPT 24 Hour Immersion/General Purpose Time Switch, 230 V, White

**Brand:** optimum
**Price:** $103
**Availability:** ❌ Out of Stock

## Summary

> ⏳ Master your daily power flow with precision and ease!

## Quick Answers

- **What is this?** Optimum OP-IHTGPT 24 Hour Immersion/General Purpose Time Switch, 230 V, White by optimum
- **How much does it cost?** $103 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/60410390-optimum-op-ihtgpt-24-hour-immersion-general-purpose-time-switch)

## Best For

- optimum enthusiasts

## Why This Product

- Trusted optimum brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Robust Load Handling:** Supports up to 16A resistive and 8A inductive loads, perfect for heavy-duty immersion heaters and appliances.
- • **Flexible Operation Modes:** Choose between timed, off, or constant settings to tailor power usage to your lifestyle and save energy.
- • **Precision 24-Hour Control:** Set your immersion or general purpose devices with 15-minute intervals for ultimate daily scheduling accuracy.
- • **Reliable Volt-Free SPDT Contacts:** Ensures safe switching without interference, ideal for professional-grade installations (note: requires contactor for LED/discharge lighting).
- • **User-Friendly Surface Mount Design:** Compact and sleek white casing fits seamlessly on any wall, with simple wiring and included cable clamps for hassle-free setup.

## Overview

The Optimum OP-IHTGPT is a 24-hour immersion and general purpose time switch designed for surface mounting, offering 15-minute interval programming and mains-synchronized accuracy (+/- 2.5 seconds/day). It supports 16A resistive and 8A inductive loads with volt-free SPDT contacts, making it ideal for controlling immersion heaters and other appliances. Compact and easy to install, it features multiple operation modes (timed/off/constant) and comes with all necessary mounting accessories.

## Description

OP-IHTGPT is a synchronous immersion heater/ general purpose time switch designed for surface mounting. It is programmable for 24 hour operation with a minimum switching setting of 15 minutes. The unit can be run on a timed/ off/ constant selections with the accuracy being mains synchronised (typically +/- 2.5 seconds per day. This timer controls a volt-free changeover switch and has a resistive rating of 16 amperes. It comes with pre-fitted (removable) links for mains switching and has an earth park terminal, 5 x wire-protect screw terminals and cable clamps installed. Without a contactor fitted, this timer is not suitable for discharge or LED lighting. Dimensions of the timer are: 121mm (H) x 72mm (W) 52mm (D), and the weight is 160G.

Review: Good product - On the whole easy to fit as I bought this to replace one that was broken
Review: Bit disappointed - Bought it for my.mother inlaw. It didn't last long at all. She's had a new one, but a different make.

## Features

- 24 hour immersion & general purpose time switch with 15 minute captive tappet intervals
- Designed for surface mounting
- Timed/ off/ constant selections
- 16 amp resistive; 8 amp inductive
- Volt free spdt contacts; Not suitable for discharge or LED lighting without a contactor

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B076HFXMVS |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 175,154 in DIY & Tools ( See Top 100 in DIY & Tools ) 287 in Timers |
| Colour | White |
| Customer Reviews | 3.9 3.9 out of 5 stars (46) |
| Date First Available | 1 April 2017 |
| Included Components | 1 x 24 Hour Timeswitch; 1 x User Instructions; 2 x Cable Clamps; 4 x Screws; 5 x Ferrules |
| Item Package Quantity | 1 |
| Item Weight | 160 g |
| Item model number | OP-IHTGPT |
| Manufacturer | Tower Flue Components |
| Material | Plastic |
| Measurement System | Metric |
| Number of Pieces | 1 |
| Part Number | OP-IHTGPT |
| Plug profile | Surface Mount |
| Power Source | AC |
| Product Dimensions | 5.2 x 7.2 x 12.1 cm; 160 g |
| Shape | Rectangle |
| Size | One Size |
| Style | Plain |
| Switch Type | 1 way |
| Switch style | SPDT |
| Usage | Inside;Amateur |
| Voltage | 230 Volts |

## Product Details

- **Brand:** Optimum
- **Colour:** White
- **Item weight:** 160 Grams
- **Material:** Plastic
- **Product dimensions:** 5.2D x 7.2W x 12.1H centimetres

## Images

![Optimum OP-IHTGPT 24 Hour Immersion/General Purpose Time Switch, 230 V, White - Image 1](https://m.media-amazon.com/images/I/8177CzZIYpL.jpg)
![Optimum OP-IHTGPT 24 Hour Immersion/General Purpose Time Switch, 230 V, White - Image 2](https://m.media-amazon.com/images/I/61Uai+l-7QL.jpg)
![Optimum OP-IHTGPT 24 Hour Immersion/General Purpose Time Switch, 230 V, White - Image 3](https://m.media-amazon.com/images/I/61P2T3fmoSL.jpg)

## Questions & Answers

**Q: I can hear the motor inside so I know it is correctly wired, but the bezel doesn't rotate so it never switches on or off while on timer. Anyone with i**
A: My one burnt out after 3 months

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good product
*by S***. on 10 August 2021*

On the whole easy to fit as I bought this to replace one that was broken

### ⭐⭐ Bit disappointed
*by N***A on 2 December 2025*

Bought it for my.mother inlaw. It didn't last long at all. She's had a new one, but a different make.

### ⭐⭐⭐⭐⭐ Great price and just what we wanted
*by M***Y on 27 March 2024*

This is a great price and very pleased with it

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**Shop now:** [https://www.desertcart.nz/products/60410390-optimum-op-ihtgpt-24-hour-immersion-general-purpose-time-switch](https://www.desertcart.nz/products/60410390-optimum-op-ihtgpt-24-hour-immersion-general-purpose-time-switch)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-21*