---
product_id: 346806525
title: "66331 Tru-Spark Ignition Firing LED Indicator, Adjustable Sensitivity"
brand: "calterm"
price: "12665 som"
currency: KGS
in_stock: true
url: https://www.desertcart.kg/products/346806525-66331-tru-spark-ignition-firing-led-indicator-adjustable-sensitivity
store_origin: KG
region: Kyrgyzstan
---

# 66331 Tru-Spark Ignition Firing LED Indicator, Adjustable Sensitivity

**Brand:** calterm
**Price:** 12665 som
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** 66331 Tru-Spark Ignition Firing LED Indicator, Adjustable Sensitivity by calterm
- **How much does it cost?** 12665 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/346806525-66331-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

## Description

66331 Tru-Spark Ignition Firing LED Indicator, Adjustable Sensitivity

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Calterm |
| Power Source | Battery Powered |
| Colour | Red |
| Item dimensions L x W x H | 5.6 x 15 x 3.6 Centimeters |
| Specification Met | CE, ETL, RoHS, UL |
| Measurement Type | Voltage |
| UPC | 971473127474 046494020230 521227771189 956257381846 |
| Manufacturer | CALTERM |
| Global Trade Identification Number | 00046494020230 |
| Product Dimensions | 5.59 x 14.99 x 3.56 cm; 18 g |
| Item model number | 66331 |
| Manufacturer Part Number | 66331 |
| Assembly Required | No |
| Country of Origin | USA |
| Item Weight | 18 g |

## Product Details

- **Brand:** Calterm
- **Power Source:** Battery Powered
- **Colour:** Red
- **Item dimensions L x W x H:** 5.6 x 15 x 3.6 Centimeters
- **Specification Met:** CE, ETL, RoHS, UL

## Images

![66331 Tru-Spark Ignition Firing LED Indicator, Adjustable Sensitivity - Image 1](https://images-na.ssl-images-amazon.com/images/G/01/x-locale/common/grey-pixel.gif)

## 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

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**Shop now:** [https://www.desertcart.kg/products/346806525-66331-tru-spark-ignition-firing-led-indicator-adjustable-sensitivity](https://www.desertcart.kg/products/346806525-66331-tru-spark-ignition-firing-led-indicator-adjustable-sensitivity)

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*Product available on Desertcart Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-01-22*