---
product_id: 534995145
title: "Aviation Fuel Tester with built-in cowl screwdriver, Model 391S, Clear and Yellow"
brand: "smartsf"
price: "€ 51.70"
currency: EUR
in_stock: true
url: https://www.desertcart.pt/products/534995145-aviation-fuel-tester-with-built-in-cowl-screwdriver-model-391s
store_origin: PT
region: Portugal
---

# Precision alcohol % markings Compact 14x17x25 cm size Built-in cowl screwdriver Aviation Fuel Tester with built-in cowl screwdriver, Model 391S, Clear and Yellow

**Brand:** smartsf
**Price:** € 51.70
**Availability:** ✅ In Stock

## Summary

> ⛽🔧 Compact power for precision pros!

## Quick Answers

- **What is this?** Aviation Fuel Tester with built-in cowl screwdriver, Model 391S, Clear and Yellow by smartsf
- **How much does it cost?** € 51.70 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/534995145-aviation-fuel-tester-with-built-in-cowl-screwdriver-model-391s)

## Best For

- smartsf enthusiasts

## Why This Product

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

## Key Features

- • **Retail Ready:** Sold individually or in convenient 5-pack retail display boxes for easy stocking.
- • **Trusted Standard:** A proven industry staple, trusted by professionals for years.
- • **All-in-One Utility:** Integrated cowl screwdriver adds essential functionality without extra bulk.
- • **Compact & Lightweight:** Weighing just 50g, it fits effortlessly into any toolkit or flight bag.
- • **Precision Fuel Testing:** No-hole probe with clear % alcohol markings ensures accurate readings every time.

## Overview

The Aviation Fuel Tester Model 391S by Daansen USA is a compact, lightweight tool featuring a no-hole probe and clear alcohol percentage markings for precise fuel analysis. Its built-in cowl screwdriver enhances utility, making it a trusted, multi-functional essential for aviation professionals.

## Description

With its compact size, no-hle probe, and % alcohol markings, this fuel tester has been a standard for years. Sold Individually, 5 per Retail Display Box

## Features

- Emergency channel, Automatic frequency tuning, Flashlight, Backup power, bottle opener and SOS alarm. This is the most multi-function 4 in 17, practical and cost-effective emergency weather radio in history.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Daansen USA, Inc. |
| Part Number | MDAN001 |
| Product Dimensions | 14 x 17 x 25 cm; 50 g |
| Item model number | 391S |
| Colour | Yellow |
| Style | Compact |
| Power Source | Battery Powered |
| Item Package Quantity | 1 |
| Batteries included? | No |
| Batteries Required? | No |
| Item Weight | 50 g |

## Product Details

- **Brand:** SmartSF
- **Power source:** Battery Powered
- **Style:** Compact
- **Colour:** Yellow
- **Item dimensions L x W x H:** 14 x 17 x 25 centimetres

## Images

![Aviation Fuel Tester with built-in cowl screwdriver, Model 391S, Clear and Yellow - Image 1](https://m.media-amazon.com/images/I/3151bCRVqvL.jpg)

## Questions & Answers

**Q: What is a aviation fuel tester for**
A: A Fuel tester is used to drain fuel at the lowest point in an aircraft fuel tank. The fuel drains into the clear part of the tester and you can see if there is any water and/or sediment (dirt) in the fuel. This is part of a pilot's pre-flight checks.

## Frequently Bought Together

- Aviation Fuel Tester with Built-in Cowl Screwdriver, Model 391S, Clear and Yellow
- Luso Aviation Fuelhawk Aircraft Fuel Gauge, Cessna 172-26.5 Gallon
- FAR/AIM 2025: Federal Aviation Regulations/Aeronautical Information Manual (ASA FAR/AIM Series)

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**Shop now:** [https://www.desertcart.pt/products/534995145-aviation-fuel-tester-with-built-in-cowl-screwdriver-model-391s](https://www.desertcart.pt/products/534995145-aviation-fuel-tester-with-built-in-cowl-screwdriver-model-391s)

---

*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-03-17*