---
product_id: 166897121
title: "Samfox 4-20mA Signal Generator, 3-21mA Adjustable High Precision DC Current Analog Simulator Two-Wire Transducer Test Signal Generator DIY Kit JS-420ISG-V2"
brand: "samfox"
price: "₪119"
currency: ILS
in_stock: true
reviews_count: 3
category: "Samfox"
url: https://www.desertcart.co.il/products/166897121-samfox-4-20ma-signal-generator-3-21ma-adjustable-high-precision
store_origin: IL
region: Israel
---

# Clear LCD with multiple display modes Rotary encoder for seamless adjustment ±0.01mA ultra-precise output Samfox 4-20mA Signal Generator, 3-21mA Adjustable High Precision DC Current Analog Simulator Two-Wire Transducer Test Signal Generator DIY Kit JS-420ISG-V2

**Brand:** samfox
**Price:** ₪119
**Availability:** ✅ In Stock

## Summary

> ⚡ Elevate your signal game with precision and style!

## Quick Answers

- **What is this?** Samfox 4-20mA Signal Generator, 3-21mA Adjustable High Precision DC Current Analog Simulator Two-Wire Transducer Test Signal Generator DIY Kit JS-420ISG-V2 by samfox
- **How much does it cost?** ₪119 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.il](https://www.desertcart.co.il/products/166897121-samfox-4-20ma-signal-generator-3-21ma-adjustable-high-precision)

## Best For

- samfox enthusiasts

## Why This Product

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

## Key Features

- • **Intuitive LCD Display Modes:** Switch effortlessly between actual current, percentage, and frequency views for real-time clarity.
- • **Smart Storage for Repeatability:** Save your settings automatically or manually, streamlining your workflow and boosting efficiency.
- • **Effortless Rotary Encoder Control:** Fine-tune your output with a smooth rotary encoder—no more guesswork, just precision.
- • **Flexible Output Range & Calibration:** Customize output from 3-21mA and calibrate linear output to perfectly match your device’s display.
- • **Pinpoint Accuracy for Pro-Level Testing:** Achieve ultra-precise current control with 0.01mA accuracy, ensuring your diagnostics never miss a beat.

## Overview

The Samfox JS-420ISG-V2 is a compact, high-precision 4-20mA signal generator designed for professional instrument and control testing. Featuring ±0.01mA accuracy, a versatile LCD display, and a rotary encoder for easy adjustment, it supports customizable output ranges and calibration. Lightweight and panel-mountable, it’s the perfect DIY kit for engineers demanding reliable, repeatable signal simulation.

## Description

Features: This signal generator can use 4-20mA to generate voltage and control the current in the circuit. Accuracy up to 0.01; Liquid crystal display; Rotary encoder adjustment ; Two connection terminals are non polarity.Output range can be set; 4-20mA (device control) / -21mA (signal debugging)Display mode can be set, it is convenient for you to see the valueLinear output can be calibrated; The actual output can be consistent with the display of customer device.Output storage: automatic storage & manual storage.2-9 programmable outputs: just rotate the encoder to set.Specification: Item Model: JS-420ISG-V2Supply Voltage: 15 - 30VOutput Range: 4 - 20mA / 3 - 21mADisplay: Actual Current / Percentage / HzSampling Resistance: ＜500 ΩOutput Accuracy: 0.5%Display Accuracy: 0.01Color: Shown As PicturesSize: Approx. 8 * 4.2 * 4.5cm / 3.14 * 1.65 * 1.77inchWeight: 44gType: Signal GeneratorPackage List:1 * Signal Generator1 * Manual

Review: Panel-mount for 1mm plate - Panel-mount for 1mm plate. Works perfect
Review: 4-20 ma Signal Generator - Works great and good value for the cost. I do instrument and control work and this is good low cost piece of test equipment.

## Features

- This signal generator can use 4-20mA to generate voltage and control the current in the circuit.
- Accuracy up to 0.01; Liquid crystal display; Rotary encoder adjustment ; Two connection terminals are non polarity.
- Output range can be set; 4-20mA (device control) / -21mA (signal debugging)
- Display mode can be set, it is convenient for you to see the value
- Linear output can be calibrated; The actual output can be consistent with the display of customer device.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07TGJPPJL |
| Best Sellers Rank | #324,674 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #174 in Function Generators |
| Date First Available | June 25, 2019 |
| Item Weight | 2.08 ounces |
| Manufacturer | samfox |
| Package Dimensions | 3.43 x 2.48 x 2.28 inches |

## Images

![Samfox 4-20mA Signal Generator, 3-21mA Adjustable High Precision DC Current Analog Simulator Two-Wire Transducer Test Signal Generator DIY Kit JS-420ISG-V2 - Image 1](https://m.media-amazon.com/images/I/519a5bvp6gL.jpg)
![Samfox 4-20mA Signal Generator, 3-21mA Adjustable High Precision DC Current Analog Simulator Two-Wire Transducer Test Signal Generator DIY Kit JS-420ISG-V2 - Image 2](https://m.media-amazon.com/images/I/61ngrHIbTiL.jpg)
![Samfox 4-20mA Signal Generator, 3-21mA Adjustable High Precision DC Current Analog Simulator Two-Wire Transducer Test Signal Generator DIY Kit JS-420ISG-V2 - Image 3](https://m.media-amazon.com/images/I/61lqC0mmFrL.jpg)
![Samfox 4-20mA Signal Generator, 3-21mA Adjustable High Precision DC Current Analog Simulator Two-Wire Transducer Test Signal Generator DIY Kit JS-420ISG-V2 - Image 4](https://m.media-amazon.com/images/I/61acrbHwIXL.jpg)
![Samfox 4-20mA Signal Generator, 3-21mA Adjustable High Precision DC Current Analog Simulator Two-Wire Transducer Test Signal Generator DIY Kit JS-420ISG-V2 - Image 5](https://m.media-amazon.com/images/I/61cdt4Qi3GL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Panel-mount for 1mm plate
*by R***F on February 6, 2025*

Panel-mount for 1mm plate. Works perfect

### ⭐⭐⭐⭐⭐ 4-20 ma Signal Generator
*by R***. on January 9, 2024*

Works great and good value for the cost. I do instrument and control work and this is good low cost piece of test equipment.

### ⭐⭐⭐⭐⭐ Provides accurate output
*by M***R on December 11, 2023*

I'm using two of these to simulate prices inputs during testing and they work very well.

## Frequently Bought Together

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*Product available on Desertcart Israel*
*Store origin: IL*
*Last updated: 2026-03-18*