---
product_id: 457334473
title: "Koolertron 0/4-20mA DC 0-10V Signal Generator,2-IN-1Portable Mini Function Generator Built-in 1000mAh Rechargeable Battery,Analog Generator with 4-Digit LCD Display,Accuracy 0.01,for PLC/Panel Testing"
brand: "koolertron"
price: "S$8"
currency: SGD
in_stock: true
reviews_count: 4
url: https://www.desertcart.sg/products/457334473-koolertron-0-4-20ma-dc-0-10v-signal-generator-2
store_origin: SG
region: Singapore
---

# 4-Digit LCD Display Accuracy 0.01 1000mAh Battery Koolertron 0/4-20mA DC 0-10V Signal Generator,2-IN-1Portable Mini Function Generator Built-in 1000mAh Rechargeable Battery,Analog Generator with 4-Digit LCD Display,Accuracy 0.01,for PLC/Panel Testing

**Brand:** koolertron
**Price:** S$8
**Availability:** ✅ In Stock

## Summary

> 🔧 Unleash Precision in Your Projects!

## Quick Answers

- **What is this?** Koolertron 0/4-20mA DC 0-10V Signal Generator,2-IN-1Portable Mini Function Generator Built-in 1000mAh Rechargeable Battery,Analog Generator with 4-Digit LCD Display,Accuracy 0.01,for PLC/Panel Testing by koolertron
- **How much does it cost?** S$8 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/457334473-koolertron-0-4-20ma-dc-0-10v-signal-generator-2)

## Best For

- koolertron enthusiasts

## Why This Product

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

## Key Features

- • **🔒 Safety First:** Features short circuit and reverse connection protection for worry-free operation.
- • **📱 Portable Design:** Lightweight and compact, designed for on-the-go professionals in R&D and maintenance.
- • **⚡ Dual Output Modes:** Easily switch between voltage (-10V to +10V) and current (0-22mA) for maximum flexibility.
- • **🔄 Versatile Functionality:** Perfect for PLC and panel debugging, ensuring seamless equipment testing.
- • **🛠️ User-Friendly Interface:** One-key operation and memory function make it easy to use, even for beginners.

## Overview

The Koolertron 0/4-20mA DC 0-10V Signal Generator is a multifunctional, portable device designed for professionals in the maintenance and R&D sectors. It features a built-in 1000mAh rechargeable battery, high accuracy of 0.01, and a user-friendly interface, making it ideal for various applications including PLC debugging and equipment testing.

## Description

Full description not available

## Features

- 【Multifunctional Frequency Generator】 Upgrade the multifunctional mini handheld digital Signal Generator. Using high-grade aluminum alloy knob, ultra-thin frosted non-slip shell, light and portable, it can be used for PLC and panel debugging, continuous speed regulation of servo motor forward and reverse, equipment testing, frequency converter, etc.
- 【2-in-1 Voltage and Current Generator.】Signal Generator Voltage output: -10V~+10V, accuracy 0.01V, easy to debug forward and reverse; Current output: 0-22mA, accuracy 0.01mA, error 5% can be calibrated. 【Built-in 1000mAh Rechargeable Battery.】Koolertron Signal Generator Built-in 3.7V 1000mAh lithium battery, easy to use, and has a power indicator.
- Built-in 1000mAh Rechargeable Battery.】Koolertron Signal Generator Built-in 3.7V 1000mAh lithium battery, easy to use, and has a power indicator.
- 【WIDE APPLICATION】:Analog Generator is a full-featured, highly practical, cost-effective handheld Function Generators developed for people in the maintenance and R&D industries,it can be used for PLC and panel debugging, device testing, frequency converter and ect.
- 【EASY TO OPERATE 】：4-20mA Signal Generator One-key switching of voltage and current, independent wiring, simultaneous output, output with short circuit protection, power supply with reverse connection protection,Store the power-on output value when power off. After use, press the knob to save, and the next time the machine is turned on, it will still be the value stored manually last time. It is easy to use, not afraid of confusion, and easy to debug.

## Product Details

- **Brand:** Koolertron
- **Wattage:** 4 watts
- **Power Source:** Battery Powered
- **Recommended Uses For Product:** Maintenance, R&D Industries
- **Voltage:** 30 Volts
- **Output Wattage:** 4 Watts
- **Special Feature:** Portable
- **Included Components:** Signal Generator
- **Color:** Black
- **Model Name:** Koolertron Signal Generator

## Images

![Koolertron 0/4-20mA DC 0-10V Signal Generator,2-IN-1Portable Mini Function Generator Built-in 1000mAh Rechargeable Battery,Analog Generator with 4-Digit LCD Display,Accuracy 0.01,for PLC/Panel Testing - Image 1](https://m.media-amazon.com/images/I/71kNWkuuQZL.jpg)
![Koolertron 0/4-20mA DC 0-10V Signal Generator,2-IN-1Portable Mini Function Generator Built-in 1000mAh Rechargeable Battery,Analog Generator with 4-Digit LCD Display,Accuracy 0.01,for PLC/Panel Testing - Image 2](https://m.media-amazon.com/images/I/71uunxqP2eL.jpg)
![Koolertron 0/4-20mA DC 0-10V Signal Generator,2-IN-1Portable Mini Function Generator Built-in 1000mAh Rechargeable Battery,Analog Generator with 4-Digit LCD Display,Accuracy 0.01,for PLC/Panel Testing - Image 3](https://m.media-amazon.com/images/I/71lsKVi+aAL.jpg)
![Koolertron 0/4-20mA DC 0-10V Signal Generator,2-IN-1Portable Mini Function Generator Built-in 1000mAh Rechargeable Battery,Analog Generator with 4-Digit LCD Display,Accuracy 0.01,for PLC/Panel Testing - Image 4](https://m.media-amazon.com/images/I/71PaoFtv04L.jpg)
![Koolertron 0/4-20mA DC 0-10V Signal Generator,2-IN-1Portable Mini Function Generator Built-in 1000mAh Rechargeable Battery,Analog Generator with 4-Digit LCD Display,Accuracy 0.01,for PLC/Panel Testing - Image 5](https://m.media-amazon.com/images/I/61VYYkZ-q6L.jpg)

## Questions & Answers

**Q: Does this allow 5-10mW granularity of signal strength?**
A: Yes, If you have any problem can feel free to contact our customer service  email"karstonecorp@gmail.com ",we are glad to service our customer.

**Q: Regarding the cjds38-b, can rf output be modulated with a tone?  i can't see from the manual how to do this.**
A: No.  Feed signal into your AM modulator.

**Q: Can a preset output signal be turned on and off using an external digital input?**
A: You are asking if there is an external trigger input if I read your question correctly.  No, there is no external trigger input to turn on a preset waveform.  You can manually turn of either channel with a push button switch on each channel.

**Q: Hi, i have this device but i would like more power (higher vpp). do i need to buy a power amplifier?**
A: Yes, you might get a lab amp, works well. At home I used a 3000W stereo amp, that worked well too.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great tool
*by R***H on September 18, 2025*

This is a great tool for signal testing. Easy to use and works good

### ⭐⭐⭐⭐⭐ Great little testers
*by S***T on April 20, 2025*

Great little testers for 4 to 20ma.

### ⭐⭐⭐⭐⭐ Not sure how it works, but it works
*by A***R on June 26, 2023*

I used this to send a 0-10v signal to some DC fans on our fan-assisted heating and cooling products in our design studio. This helps to simulate a BackNet or Building Management System which would utilize a 0-10v signal to control fan speed, as opposed to our other automated control options. We may need to get more of these so we can take them to job sites and demo / troubleshoot our fans. I hardly know anything about electrical, but I figured this out on the first go. Does exactly what we hoped it would.

## Frequently Bought Together

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-02-16*