--- product_id: 346806525 title: "Calterm 66331 Tru-Spark Ignition Firing LED Indicator, Adjustable Sensitivity" brand: "calterm" price: "NZ$97" currency: NZD in_stock: true reviews_count: 5 url: https://www.desertcart.nz/products/346806525-calterm-66331-tru-spark-ignition-firing-led-indicator-adjustable-sensitivity store_origin: NZ region: New Zealand --- # Calterm 66331 Tru-Spark Ignition Firing LED Indicator, Adjustable Sensitivity **Brand:** calterm **Price:** NZ$97 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** Calterm 66331 Tru-Spark Ignition Firing LED Indicator, Adjustable Sensitivity by calterm - **How much does it cost?** NZ$97 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/346806525-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 ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B000JFHMPC | | Brand Name | Calterm | | Colour | Red | | Country Of Origin | USA | | Customer Reviews | 4.2 4.2 out of 5 stars (354) 4.2 out of 5 stars | | Global Trade Identification Number | 00046494020230 | | Item Dimensions | 5.6 x 15 x 3.6 Centimeters | | Manufacturer | Calterm | | Measurement Type | Voltage | | Model Number | 66331 | | Part Number | 66331 | | Power Source Type | Battery Powered | | Specification Met | CE, ETL, RoHS, UL | | Unit Count | 1.00 Count | | Upc | 971473127474 046494020230 521227771189 956257381846 | ## Product Details - **Brand:** Calterm - **Colour:** Red - **Item dimensions L x W x H:** 5.6 x 15 x 3.6 Centimeters - **Power Source:** Battery Powered - **Specification Met:** CE, ETL, RoHS, UL ## Images ![Calterm 66331 Tru-Spark Ignition Firing LED Indicator, Adjustable Sensitivity - Image 1](https://m.media-amazon.com/images/I/71R5oKpSNAL.jpg) ![Calterm 66331 Tru-Spark Ignition Firing LED Indicator, Adjustable Sensitivity - Image 2](https://m.media-amazon.com/images/I/71e2wcEolPL.jpg) ![Calterm 66331 Tru-Spark Ignition Firing LED Indicator, Adjustable Sensitivity - Image 3](https://m.media-amazon.com/images/I/71JaUL5uNJL.jpg) ![Calterm 66331 Tru-Spark Ignition Firing LED Indicator, Adjustable Sensitivity - 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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Easy to use. *by on Reviewed in the United States 20 May 2024* This is the second one of these that I've had. I should have never let a co-worker borrow the first one. He quit and I never got it back. It's a nice little unit for testing to see if you have a plug that's firing like it should. It has a a clip so can stick it in your pocket. A thumb wheel that you can turn the sensitivity setting up or down with. The pocket clip acts as an on switch. Just hold it down and the green light comes on. Put it next to a plug wire or a coil tower or a spark plug boot. And if getting spark. The green light will pulse red every time it fires. The top part of the pocket clip hold in the three coin batteries that makes it work. The first one I had the batteries lasted for a long time. (several years) Fairly rugged. Had mine fall out of my pocket onto a concrete floor many times and it never effected the way it worked. Handy device that I feel is well worth the money. ### ⭐⭐⭐⭐⭐ Good *by on Reviewed in Canada 21 July 2024* Work very good ### ⭐⭐⭐⭐⭐ Handy tool *by on Reviewed in Canada 10 May 2019* Very handy tool. Accurate. Just remember that this is a firing tool, if your engine is not capable of firing ie. Too much fuel. It will not show you the energy coming from the coil. ## 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.nz/products/346806525-calterm-66331-tru-spark-ignition-firing-led-indicator-adjustable-sensitivity](https://www.desertcart.nz/products/346806525-calterm-66331-tru-spark-ignition-firing-led-indicator-adjustable-sensitivity) --- *Product available on Desertcart New Zealand* *Store origin: NZ* *Last updated: 2026-09-13*