---
product_id: 27131358
title: "20 Amp Constant Current Pulse Width Modulator with LCD Display &amp; Wiring Kit HHO Gas PWM for Hydrogen Generators (Small Engines)"
brand: "hydrogen generators usa"
price: "$U18908"
currency: UYU
in_stock: false
url: https://www.desertcart.uy/products/27131358-20-amp-constant-current-pulse-width-modulator-with-lcd-display
store_origin: UY
region: Uruguay
---

# 20 Amp Constant Current Pulse Width Modulator with LCD Display &amp; Wiring Kit HHO Gas PWM for Hydrogen Generators (Small Engines)

**Brand:** hydrogen generators usa
**Price:** $U18908
**Availability:** ❌ Out of Stock

## Quick Answers

- **What is this?** 20 Amp Constant Current Pulse Width Modulator with LCD Display &amp; Wiring Kit HHO Gas PWM for Hydrogen Generators (Small Engines) by hydrogen generators usa
- **How much does it cost?** $U18908 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/27131358-20-amp-constant-current-pulse-width-modulator-with-lcd-display)

## Best For

- hydrogen generators usa enthusiasts

## Why This Product

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

## Description

Commercial Grade Pulse Width Modulator. Maximum Load: 20 amps.  Most HHO systems on the market do not include PWMs with the Constant Current feature (some don't have a PWM at all). Very important for controlling amps, if not it will cause your HHO system to heat up and cause a host of issues.  The PWM is the Heart of your Hydrogen Generator System. This Pulse Width Modulator is really a number of devices combined into one unit:  On/Off Switch - Master switch for the whole system. The system can be shut off with a physically switch on the PWM itself, or it can be shut down in software through the LCD Controller.  Safety Shut-Off - Important safety feature - System has 2 methods to detect when the engine isn't running, and shuts itself down automatically.  Constant Current Function - User selects the maximum current they want the system to run. The PWM will never go over that current. When the current tries to go above the maximum current value, the duty cycle automatically reduces to maintain the current at its set maximum value. This prevents current run away that has been common with HHO systems that use other PWMs.  LCD Controller - Gives continuous read out for; Amps, Volts, Frequency & Duty Cycle.  Dimensions: PWM: 5-1/8" (W) x 4-1/2" (L) x 1-3/4" (H) LCD Display: 5.25" (W) x 3.25" (L) x 1.1" (H) Both Include Mounting Flanges.

## Features

- Constant Current - You Control Maximum Current = No Run-Away AMPS
- LCD Controller - Provides Continous Read Out For AMPS, Voltage, Frequency, Duty Cycle and Possible Float Switch.
- On/Off Switch -Controls Entire HHO System &amp; Safety Shut-Off (The system has 2 methods of safety shut down).
- No Fan Needed - The body is a big heat sink. This means there are no moving parts to fail.
- Easy to Read Instructions with Video Access for Display Functions. Support (if needed).

## Images

![20 Amp Constant Current Pulse Width Modulator with LCD Display &amp; Wiring Kit HHO Gas PWM for Hydrogen Generators (Small Engines) - Image 1](https://images-na.ssl-images-amazon.com/images/I/41XAIccqHuL.jpg)
![20 Amp Constant Current Pulse Width Modulator with LCD Display &amp; Wiring Kit HHO Gas PWM for Hydrogen Generators (Small Engines) - Image 2](https://images-na.ssl-images-amazon.com/images/I/517GHAvL1gL.jpg)
![20 Amp Constant Current Pulse Width Modulator with LCD Display &amp; Wiring Kit HHO Gas PWM for Hydrogen Generators (Small Engines) - Image 3](https://images-na.ssl-images-amazon.com/images/I/31SChhmZK0L.jpg)
![20 Amp Constant Current Pulse Width Modulator with LCD Display &amp; Wiring Kit HHO Gas PWM for Hydrogen Generators (Small Engines) - Image 4](https://images-na.ssl-images-amazon.com/images/I/21POwN%2BS-pL.jpg)
![20 Amp Constant Current Pulse Width Modulator with LCD Display &amp; Wiring Kit HHO Gas PWM for Hydrogen Generators (Small Engines) - Image 5](https://images-na.ssl-images-amazon.com/images/I/31DREVarLKL.jpg)

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-01-22*