--- product_id: 7531859 title: "Calterm 66331 Tru-Spark Ignition Firing LED Indicator, Adjustable Sensitivity, Green,Red" brand: "calterm" price: "8978 som" currency: KGS in_stock: true category: "Calterm" url: https://www.desertcart.kg/products/7531859-calterm-66331-tru-spark-ignition-firing-led-indicator-adjustable-sensitivity store_origin: KG region: Kyrgyzstan --- # Adjustable sensitivity dial for precision Durable ABS housing resists oil & impact Dual LED indicators for real-time status Calterm 66331 Tru-Spark Ignition Firing LED Indicator, Adjustable Sensitivity, Green,Red **Brand:** calterm **Price:** 8978 som **Availability:** ✅ In Stock ## Summary > ⚡ Never miss a spark—ignite your diagnostics with precision and confidence! ## Quick Answers - **What is this?** Calterm 66331 Tru-Spark Ignition Firing LED Indicator, Adjustable Sensitivity, Green,Red by calterm - **How much does it cost?** 8978 som with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/7531859-calterm-66331-tru-spark-ignition-firing-led-indicator-adjustable-sensitivity) ## Best For - calterm enthusiasts ## Why This Product - Trusted calterm brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Endure:** Rugged high-impact ABS casing withstands harsh shop environments and oil exposure without fail. - • **Compact & Lightweight:** At just 0.634 ounces and pocket-sized, it’s the perfect on-the-go ignition tester for busy technicians. - • **Instant Visual Feedback:** Green LED confirms tester readiness; red LED flashes with each ignition spark for real-time monitoring. - • **Universal Compatibility:** Seamlessly works with both DIS and conventional ignition systems, making it a versatile tool for pros. - • **Pinpoint Ignition Accuracy:** Exclusive sensitivity dial isolates specific plug wires, eliminating false signals for flawless diagnostics. ## Overview The Calterm 66331 Tru-Spark Ignition Firing LED Indicator is a compact, battery-powered tool featuring an exclusive adjustable sensitivity dial to isolate plug wires and prevent false signals. Equipped with green and red LEDs for clear operational and ignition feedback, it boasts a rugged ABS housing designed to resist oil and endure tough shop conditions. Compatible with both DIS and conventional ignition systems, this precision tester is engineered for professional-grade ignition diagnostics. ## Description Testing equipment can be put to good use ensuring that electrical equipment is properly installed and safe to operate. Faulty installations can be lethal; the condition of electrical installations can be established when contractors use test equipment. Calterm is please to offer an innovative full feature line of test equipment designed to make electrical work faster and safer. Quickly and accurately test DIS and other ignition systems for the presence of secondary voltage without piercing or removing spark plug wires. Great for troubleshooting 'no-starts'. ## Features - SENSITIVITY ADJUSTMENT DIAL is a Calterm EXCLUSIVE feature that allows isolation of a specific plug wire and eliminates false signals from wires routed in close proximity. - Green LED indicates that the tester and batteries are operating properly. - Red LED flashes each time voltage is released from the coil through the spark plug wire. - Rugged high impact ABS housing resists oil and endures shop conditions. - Works with DIS and conventional ignition systems. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000JFHMPC | | Best Sellers Rank | #274,884 in Automotive ( See Top 100 in Automotive ) #311 in Powersports Ignition Coils | | Brand Name | Calterm | | Color | Green,Red | | Compatible Devices | Vehicles with DIS or conventional ignition systems | | Customer Reviews | 4.2 4.2 out of 5 stars (367) | | Global Trade Identification Number | 00046494020230 | | Item Dimensions | 2.2 x 5.9 x 1.4 inches | | Item Type Name | LED Indicator | | Manufacturer | Calterm | | Measurement Type | Voltage | | Model | 66331 | | Part Number | 66331 | | Power Source | Battery Powered | | Specification Met | CE, ETL, RoHS, UL | | Style Name | Adjustable | | UPC | 971473127474 046494020230 521227771189 956257381846 | | Unit Count | 1.00 Count | ## Product Details - **Brand:** Calterm - **Color:** Green,Red - **Item dimensions L x W x H:** 2.2 x 5.9 x 1.4 inches - **Power Source:** Battery Powered - **Style:** Adjustable ## Images ![Calterm 66331 Tru-Spark Ignition Firing LED Indicator, Adjustable Sensitivity, Green,Red - Image 1](https://m.media-amazon.com/images/I/71R5oKpSNAL.jpg) ![Calterm 66331 Tru-Spark Ignition Firing LED Indicator, Adjustable Sensitivity, Green,Red - Image 2](https://m.media-amazon.com/images/I/71e2wcEolPL.jpg) ![Calterm 66331 Tru-Spark Ignition Firing LED Indicator, Adjustable Sensitivity, Green,Red - Image 3](https://m.media-amazon.com/images/I/71JaUL5uNJL.jpg) ![Calterm 66331 Tru-Spark Ignition Firing LED Indicator, Adjustable Sensitivity, Green,Red - Image 4](https://m.media-amazon.com/images/I/819anuVXdGL.jpg) ## Questions & Answers **Q: Does clamp on?** A: Hi, no it's not for clamping on, it's for detecting for a spark and so you just touch it on the ht lead **Q: does it work on small engine 4-cycle, 12V** A: Our Service dept use this all the time on small engines. You do have to properly adjust the dial on the unit for small engines. We use as a quick test. **Q: does this actually detect if the plug wire is pulled loose from the plug itself?** A: Probably not, but a good visual inspection should. I use it to narrow down suspect cylinders that have a misfire such as a defective coil or wire. I have also found plugs that arc inside the plug boots. **Q: Will this work on fuel injectors ?** A: No- Just ignitions. Fuel injectors are low voltage. ## Frequently Bought Together - Calterm 66331 Tru-Spark Ignition Firing LED Indicator, Adjustable Sensitivity, Green,Red - Lisle 19380 Spark Tester - allsun Automotive Spark Ignition Tester 6-24V Pen Engine Indicator Spark Plug Car Wires Coils Diagnostic Tool Auto Voltage Cable Detector Small Engine Tools --- ## 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.kg/products/7531859-calterm-66331-tru-spark-ignition-firing-led-indicator-adjustable-sensitivity](https://www.desertcart.kg/products/7531859-calterm-66331-tru-spark-ignition-firing-led-indicator-adjustable-sensitivity) --- *Product available on Desertcart Kyrgyzstan* *Store origin: KG* *Last updated: 2026-05-19*