---
product_id: 527470414
title: "1/4\" 3/8\" 1/2\" 3/4\" 1\" 1-1/2\" 2\" BSPT Female 304 Stainless Window Sight Glass Flow Indicator With Impeller (3/4\" DN20)"
brand: "wzhlcx"
price: "£36.64"
currency: GBP
in_stock: true
reviews_count: 11
category: "Wzhlcx"
url: https://www.desertcart.co.uk/products/527470414-1-4-3-8-1-2-3-4-1-1
store_origin: GB
region: United Kingdom
---

# High-visibility PTFE impeller 304 Stainless Steel durability 180° clear glass observation 1/4" 3/8" 1/2" 3/4" 1" 1-1/2" 2" BSPT Female 304 Stainless Window Sight Glass Flow Indicator With Impeller (3/4" DN20)

**Brand:** wzhlcx
**Price:** £36.64
**Availability:** ✅ In Stock

## Summary

> 👁️‍🗨️ Flow Insight, Engineered for Pros

## Quick Answers

- **What is this?** 1/4" 3/8" 1/2" 3/4" 1" 1-1/2" 2" BSPT Female 304 Stainless Window Sight Glass Flow Indicator With Impeller (3/4" DN20) by wzhlcx
- **How much does it cost?** £36.64 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/527470414-1-4-3-8-1-2-3-4-1-1)

## Best For

- wzhlcx enthusiasts

## Why This Product

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

## Key Features

- • **Temperature Toughness:** Operates reliably up to 120°C, perfect for demanding industrial environments.
- • **Versatile Installation:** Supports both horizontal and vertical mounting for seamless integration.
- • **See Flow Like Never Before:** Red PTFE impeller ensures instant visual confirmation of fluid movement.
- • **Crystal Clear 180° Viewing:** Wide-angle glass window offers comprehensive flow monitoring from multiple angles.
- • **Built to Last in Tough Conditions:** Premium 304 stainless steel resists corrosion across water, oil, gas, and acids.

## Overview

This 1/2" BSPT female flow indicator features a vivid red PTFE impeller housed in a durable 304 stainless steel body with a 180° clear glass window. Designed for versatile installation and capable of handling temperatures up to 120°C, it provides precise, real-time visual monitoring of liquids and gases in industrial pipelines, ensuring operational confidence and streamlined diagnostics.

## Description

The single-tube impeller type observer, also known as the impeller sight glass, is a necessary accessory to observe the flow of the medium in the pipeline. The impeller sight glass is widely used in industrial production equipment such as petroleum, chemical industry, chemical fiber, medicine, food, etc. It can observe the flow reaction of liquid, gas, steam and other media at any time, and is an indispensable accessory to ensure normal production.

Review: Excellent way to SEE the flow. Peace of mind ✔️ - Standard fittings, clear indication of flow. Precisely what was needed ✅
Review: Great when you need to see what is going on - I got this to aid with diagnostics of flow issues with vehicle cooling systems. It works great, it doesn't leak, shows you exactly what is going on inside the engine, I am very happy I picked this up.

## Features

- - Impeller: made of PTFE, the color is red and has a high visibility effect
- Medium: water, oil, gas and acid, alkaline liquid or toxic gas
- Working temperature: 120°C≤
- Installation: Both lying and standing are possible, and the observation is convenient and clear.
- (3) Characteristics of flow indicator 1. The surface glass of the window is easy to clean. 2. The glass window can be observed in 180° direction.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BDKXY3D4 |
| Best Sellers Rank | #321,239 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #285 in Flowmeters |
| Brand | WZHLCX |
| Brand Name | WZHLCX |
| Color | Silver |
| Connector Type | Threaded |
| Customer Reviews | 4.2 out of 5 stars 34 Reviews |
| Exterior Finish | Stainless Steel |
| Item Dimensions | 4.3 x 3 x 3.14 inches |
| Item Type Name | Flow Indicator |
| Item Weight | 1.1 Pounds |
| Item dimensions L x W x H | 4.3 x 3 x 3.14 inches |
| Manufacturer | WZHLCX |
| Manufacturer Part Number | SUS25 |
| Material | Metal |
| Material Type | Metal |
| Model Number | SUS25 |
| Number of Pieces | 1 |
| Size | 3/4" DN20 |
| Thread Size | 3/4 inch |
| Thread Type | BSPT |

## Product Details

- **Size:** 3/4" DN20
- **Material:** Metal
- **Brand:** WZHLCX
- **Color:** Silver
- **Item dimensions L x W x H:** 4.3 x 3 x 3.14 inches
- **Connector Type:** Threaded
- **Thread Size:** 3/4 inch
- **Exterior Finish:** Stainless Steel
- **Thread Type:** BSPT
- **Item Weight:** 1.1 Pounds

## Images

![1/4" 3/8" 1/2" 3/4" 1" 1-1/2" 2" BSPT Female 304 Stainless Window Sight Glass Flow Indicator With Impeller (3/4" DN20) - Image 1](https://m.media-amazon.com/images/I/516T77ySBtL.jpg)
![1/4" 3/8" 1/2" 3/4" 1" 1-1/2" 2" BSPT Female 304 Stainless Window Sight Glass Flow Indicator With Impeller (3/4" DN20) - Image 2](https://m.media-amazon.com/images/I/41DaIMN5ClL.jpg)
![1/4" 3/8" 1/2" 3/4" 1" 1-1/2" 2" BSPT Female 304 Stainless Window Sight Glass Flow Indicator With Impeller (3/4" DN20) - Image 3](https://m.media-amazon.com/images/I/51hNOyh+tKL.jpg)
![1/4" 3/8" 1/2" 3/4" 1" 1-1/2" 2" BSPT Female 304 Stainless Window Sight Glass Flow Indicator With Impeller (3/4" DN20) - Image 4](https://m.media-amazon.com/images/I/51+GJrKRAlL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent way to SEE the flow. Peace of mind ✔️
*by R***D on May 4, 2023*

Standard fittings, clear indication of flow. Precisely what was needed ✅

### ⭐⭐⭐⭐ Great when you need to see what is going on
*by W***S on July 5, 2024*

I got this to aid with diagnostics of flow issues with vehicle cooling systems. It works great, it doesn't leak, shows you exactly what is going on inside the engine, I am very happy I picked this up.

### ⭐⭐⭐⭐⭐ As advertised..
*by M***R on February 5, 2025*

As advertised!

## Frequently Bought Together

- 1/4" 3/8" 1/2" 3/4" 1" 1-1/2" 2" BSPT Female 304 Stainless Window Sight Glass Flow Indicator With Impeller (3/4" DN20)
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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-30*