--- product_id: 474164897 title: "Riiai SG004A 4-20ma 0-24V Signal Generator, Programmable Current Voltage Generator, Resistance Millivolt Thermocouple Tester, Real-time Curve, 3000mAh USB Rechargeable, for PLC Simulator" brand: "riiai" price: "S$292" currency: SGD in_stock: true reviews_count: 6 category: "Riiai" url: https://www.desertcart.sg/products/474164897-riiai-sg004a-4-20ma-0-24v-signal-generator-programmable-current store_origin: SG region: Singapore --- # 0-24V voltage output Real-time curve & historical data 3000mAh USB rechargeable battery Riiai SG004A 4-20ma 0-24V Signal Generator, Programmable Current Voltage Generator, Resistance Millivolt Thermocouple Tester, Real-time Curve, 3000mAh USB Rechargeable, for PLC Simulator **Brand:** riiai **Price:** S$292 **Availability:** ✅ In Stock ## Summary > ⚙️ Power your precision — never miss a signal wave! ## Quick Answers - **What is this?** Riiai SG004A 4-20ma 0-24V Signal Generator, Programmable Current Voltage Generator, Resistance Millivolt Thermocouple Tester, Real-time Curve, 3000mAh USB Rechargeable, for PLC Simulator by riiai - **How much does it cost?** S$292 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/474164897-riiai-sg004a-4-20ma-0-24v-signal-generator-programmable-current) ## Best For - riiai enthusiasts ## Why This Product - Trusted riiai brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **All-Day Powerhouse:** 3000mAh rechargeable battery delivers up to 26 hours of uninterrupted field use. - • **Plug & Play Precision:** Color-coded multi-interface terminals ensure quick, error-free connections every time. - • **Visualize Every Change:** Real-time curve display with historical record lets you track signal trends effortlessly. - • **Tailored Output Control:** Programmable output modes with presets for seamless PLC, servo, and device debugging. - • **Multi-Mode Signal Mastery:** Supports mA, V, Hz, resistance & millivolt signals with ultra-fine resolution for precise testing. ## Overview The Riiai SG004A is a compact, programmable 4-20mA and 0-24V signal generator designed for professional testing and simulation. Featuring multi-signal support, real-time curve visualization, and a robust 3000mAh rechargeable battery, it offers versatile, precise control for PLC simulators, thermocouple testing, and industrial device calibration. Its intuitive color-coded ports and programmable presets make it an indispensable tool for engineers and technicians seeking reliable, on-the-go signal generation. ## Description Product description Riiai Programmable Voltage Current Signal Generator, Multiple Signal Types, 3000ma-h USB Rechargeable, Historical Record, Thermocouple Test * The Advantages of Riiai 004 Multifunctional Signal Generator* Support Conversion of Various Signal Types --- Compared with the Riiai 003 signal generator, the 004 type 4 20 ma calibrator is upgraded to support switching various signal modes available under different signal types: mA Current Signal(0 to 24 mA, resolution 0.001mA), V Voltage Signal(0 to 24V, resolution 0.001V), XMT Passive Current Signal(0 to 24mA, resolution 0.001mA), Hz Pulse Signal(Frequency Output 0 to 9999Hz, resolution 5 digits), Resistance (0-390Ω, resolution 0.1Ω) Millivolt(-10-100mv, resolution 0.01mv). The functional generator can be applied to more tests. 2.4 Inch TFT Colorful Screen--- The 004 digital voltage-current signal generator is designed with an adjustable pressing button backlight and a high-definition resolution 240*320 TFT color LCD screen. Ultra clear screen makes the 4 20ma 0 24V current voltage loop simulator easier to display the different programmable output. No fear of the dim working conditions anymore. Built-in 3000 mA-h USB Rechargeable --- Riiai analog simulator generator adopts a 3000 mA-h 3.7V built-in USB rechargeable battery(charged via a micro 5V USB port), it can be fully charged within 4-6 hours. Its working time can reach up to 26 hours, providing you with longer time for fieldwork. Real-time Curve & Historical Record Review --- The 004 4 to 20ma 0 to 24v adjustable signal generator supports displaying the change trend of input and output signals by drawing a curve. The sampling time of the curve can be set and the current-voltage generator supports recording and viewing a certain amount of historical data. Programmable Output--- The 4 20ma signal generator has the output function of auto and continuously changes the size according to the set parameters and chooses three modes: monotonous rise, monotonous fall, and cycle. It will automatically adjust the display curve within the range of the maximum and minimum values within a certain period. Technical Parameter Active current output: range: 0~24mA; resolution: 0.01 mA; maximum load: 750Ω;Precision:±(0.1%+0.005) Passive current output: range: 0-24 mA; resolution: 0.01 mA; external power supply up to 30V;Precision:±(0.1%+0.005) Voltage output: range: 0-24 V; resolution: 0.01v; maximum current 30mA;Precision:±(0.1%+0.005) 24ma Current output: drive current: 24mA;resolution: 0.001 mA;Precision:±(0.1%+0.005) Current input measurement: range: 0-24 mA; resolution: 0.001 mA; input impedance:100Ω;Precision:±(0.1%+0.05) Voltage input measurement: range: 0-30 V; resolution: 0.001 V; input impedance: 2MΩ;Precision:±(0.1%+0.05) PWM output (frequency):Range: 0-9999Hz Resistance: range: 0-390Ω, resolution:0.1Ω, precision:±(0.2%+1) Millivolt: range: -10-100mv, resolution:0.01mv, precision:±(0.03%+0.03) A single 3.7V 3000mAh lithium battery power supply; Standby time is 26 hours;the using time varies, based on the usage(It can be 8-10 hours with 20mA continuous output) Note 1. Please read the manual carefully before use to have a better understanding of the signal generator. 2. The limit voltage of the input terminal can't be greater than 30Vpp, otherwise the over limit will damage the equipment. Clear LCD Display With a TFT high-resolution color screen, you can easily see the voltage and current changes. It is designed with a button backlight, you can easily get the simple operation in the day and night. Better reading experience and clearer to read the values. 3000ma-h Rechargeable Battery With a 3000mA-h 3.7V built-in USB rechargeable battery embedded inside (charged via a micro 5V USB port), the function generator can be fully charged within 4-6 hours. Its working time can reach up to 26 hours. Longer working service provides you with higher working efficiency. Premium Material The 0 to 20 ma signal generator is made from premium soft silicone that will give you a comfortable grip while protecting the main machine. Not easy to fall down or break. Packing List 1* Multifunctional Signal generator 4*Test Clip 1* USB C-type Cable 1*User Manual 1*Storage Box Riiai Programmable Signal Generator Specification Battery: 3000mAh battery power supply Standby time: 26 hours; the using time varies, based on the usage(It can be 8-10 hours with 20mA continuous output) Operating environment: 0 °C - 50 °C. Internal reverse and overcurrent protection: protection voltage:30V Package size: 150 * 145 * 80mm Package weight: 474g Review: Very useful tool for work applications - This signal generator has been very helpful for my work. It’s a practical tool for testing and simulating signals, and once you understand the basics, it works very well. It’s not extremely simple to use at first, but it’s also not complicated. After a short learning curve, it becomes easy to operate and delivers reliable results. The device feels solid and performs as expected. Overall, it’s a great tool for professional or technical use. I’m very satisfied with it and would definitely recommend it to others who need a reliable signal generator. Review: Great product. - Great product to have in your pocket. ## Features - More Conversion Choices：Riiai 004 pocket millivolt generator can support switching more signal modes under different signal types: mA Current Signal (0 to 24 mA, resolution 0.001mA), V Voltage Signal (0 to 24V, resolution 0.001V), XMT Passive Current Signal (0 to 24mA, resolution 0.001mA), Hz Pulse Signal (Frequency Output 0 to 9999 Hz, resolution 5 digits), Resistance (0-390Ω, resolution 0.1Ω, temperature unit set to Celsius or Fahrenheit), Millivolt (-10-100mV, resolution 0.01mV) - Real-time Curve & Historical Record： Riiai 004 model 4-20ma signal generator supports 4 groups of commonly used signal values that can be preset to facilitate quick adjustment of output. The current-voltage analog simulator is designed to automatically display the changing trend of input and output signals by the real-time curve, and the sampling time of the curve can be set. Compared with the 003 model, it supports recording and viewing a certain amount of historical data in an easier way - Multiple Interface Terminals：The 0 to 24V DC signal generator kit adopts 4 inner diameters and 4mm wiring ports on the top surface that are represented by different color rings. The Blue port (IN-) is an alternate function, and it is also an input that can be switched to a 24V independent test power supply. The Red (OUT) port and Black (COM) port form an output port. Yellow (IN+) and Blue(IN-) form the input port. Users can choose the correct color cables and ports to start testing - 3000 mAh USB Rechargeable & TFT Screen： With a 3000mAh 3.7V USB rechargeable battery (charged via a micro 5V USB port, the adapter is not included), the thermocouple calibrator can be fully charged within 4-6 hours, with a working time of up to 26 hours. It takes longer time to use and makes it easier to know the value changes through the clear 2.4-inch TFT screen display, and users can adjust the screen backlight according to the field - Programmable Output & Wide Application： The 0 24v DC signal generator has the output function of auto, continuously changes the size according to the set parameters, and chooses three modes: monotonous rise, monotonous fall, and cycle. 4 groups of commonly used signal values can be preset to facilitate quick adjustment of output. It is widely used for PLC and panel debugging, device testing, frequency converter, flow valve, servo motors speed regulation, light dimmer, etc ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0B8V811G6 | | Best Sellers Rank | #38,989 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #9 in Function Generators | | Brand | Riiai | | Brand Name | Riiai | | Color | Blue | | Compatible Devices | PLC, panel, frequency converter, flow valve, servo motor, light dimmer, etc. | | Customer Reviews | 4.2 out of 5 stars 16 Reviews | | Item Dimensions | 4.41 x 3.23 x 1.06 inches | | Item Weight | 165 Grams | | Item dimensions L x W x H | 4.41 x 3.23 x 1.06 inches | | Manufacturer | Riiai | | Measurement Type | Ammeter, Voltmeter, Ohmmeter | | Model | SG004 | | Part Number | LSYUS51ZHP0029 | | Power Source | Battery Powered | | Style | fashion | | Style Name | fashion | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Riiai - **Color:** Blue - **Item Weight:** 165 Grams - **Power Source:** Battery Powered - **Style:** fashion ## Images ![Riiai SG004A 4-20ma 0-24V Signal Generator, Programmable Current Voltage Generator, Resistance Millivolt Thermocouple Tester, Real-time Curve, 3000mAh USB Rechargeable, for PLC Simulator - Image 1](https://m.media-amazon.com/images/I/71pNtGyBb+L.jpg) ![Riiai SG004A 4-20ma 0-24V Signal Generator, Programmable Current Voltage Generator, Resistance Millivolt Thermocouple Tester, Real-time Curve, 3000mAh USB Rechargeable, for PLC Simulator - Image 2](https://m.media-amazon.com/images/I/71UwviU6LXL.jpg) ![Riiai SG004A 4-20ma 0-24V Signal Generator, Programmable Current Voltage Generator, Resistance Millivolt Thermocouple Tester, Real-time Curve, 3000mAh USB Rechargeable, for PLC Simulator - Image 3](https://m.media-amazon.com/images/I/71v384bxVvL.jpg) ![Riiai SG004A 4-20ma 0-24V Signal Generator, Programmable Current Voltage Generator, Resistance Millivolt Thermocouple Tester, Real-time Curve, 3000mAh USB Rechargeable, for PLC Simulator - Image 4](https://m.media-amazon.com/images/I/71w1GTWjZQL.jpg) ![Riiai SG004A 4-20ma 0-24V Signal Generator, Programmable Current Voltage Generator, Resistance Millivolt Thermocouple Tester, Real-time Curve, 3000mAh USB Rechargeable, for PLC Simulator - Image 5](https://m.media-amazon.com/images/I/71dTo-l+-vL.jpg) ## Available Options This product comes in different **Model** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Very useful tool for work applications *by G***Z on January 15, 2026* This signal generator has been very helpful for my work. It’s a practical tool for testing and simulating signals, and once you understand the basics, it works very well. It’s not extremely simple to use at first, but it’s also not complicated. After a short learning curve, it becomes easy to operate and delivers reliable results. The device feels solid and performs as expected. Overall, it’s a great tool for professional or technical use. I’m very satisfied with it and would definitely recommend it to others who need a reliable signal generator. ### ⭐⭐⭐⭐⭐ Great product. *by A***D on October 16, 2025* Great product to have in your pocket. ### ⭐⭐⭐ Works well so far..... *by R***. on November 6, 2025* Comes in a well organized package with all the components needed, including an operating manual. Unit firm and sturdy. Beautifully colored to identify varous lead etc. Reasonable size (palm size). Big enough for your hands but small enough to fit in your pocket, making transporting easy. Display big enough for easy read. Good Backlight. Seems to be fairly accurate when tested. Instructions are a bit hard to follow. Currently familiarizing myself with the various parameters and so far it is delivering what it says it can. I will provide more updates as I get more acquainted with this meter ## Frequently Bought Together - Riiai 4 20ma 0 24V Signal Generator, Programmable Current Voltage Generator, Resistance Millivolt Thermocouple Tester, Real-time Curve, Historical Record, 3000mAh USB Rechargeable, for PLC Simulator - Adjustable 4-20mA Signal Generator Current Voltage Analog Simulator 0-10V/0-22mA Signal Sources for Value Adjusting PLC Controller Panel LED Testing Calibration - Riiai Upgraded 4-20mA 0-24V Current Signal Generator, Current Voltage Adjustable Analog Simulator, Real-time Curve, Multiple Signal Types, 3000mAh USB Rechargeable, Preset Value, for PLC Testing --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sg/products/474164897-riiai-sg004a-4-20ma-0-24v-signal-generator-programmable-current](https://www.desertcart.sg/products/474164897-riiai-sg004a-4-20ma-0-24v-signal-generator-programmable-current) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-05-18*