---
product_id: 52579709
title: "Aprilaire 51 Current Sensing Relay"
brand: "aprilaire"
price: "£46.65"
currency: GBP
in_stock: false
url: https://www.desertcart.co.uk/products/52579709-aprilaire-51-current-sensing-relay
store_origin: GB
region: United Kingdom
---

# Aprilaire 51 Current Sensing Relay

**Brand:** aprilaire
**Price:** £46.65
**Availability:** ❌ Out of Stock

## Quick Answers

- **What is this?** Aprilaire 51 Current Sensing Relay by aprilaire
- **How much does it cost?** £46.65 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/52579709-aprilaire-51-current-sensing-relay)

## Best For

- aprilaire enthusiasts

## Why This Product

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

## Description

Current sensing relay used to turn Aprilaire humidifiers on when indoor blower of air handler is energized. Makes installing any humidifier easier than ever before.

## Features

- Voltage Range: 100-125 VAC, 50-60 Hz
- Sensing Current: Minimum of 4.0 Amps
- It can also be used to simplify installation of inline duct booster fans
- Relay must sense all four amps in order for it to open and close properly
- ›See more product details

## Images

![Aprilaire 51 Current Sensing Relay - Image 1](https://images-na.ssl-images-amazon.com/images/I/81EOF4CmXIL.jpg)

---

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**Shop now:** [https://www.desertcart.co.uk/products/52579709-aprilaire-51-current-sensing-relay](https://www.desertcart.co.uk/products/52579709-aprilaire-51-current-sensing-relay)

---

*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-27*