---
product_id: 520625571
title: "BTM-400Plus Belt Tension Meter / Trummeter, Range 3 - 800 Hz"
brand: "checkline"
price: "€ 3128.45"
currency: EUR
in_stock: true
category: "Checkline"
url: https://www.desertcart.hr/products/520625571-btm-400plus-belt-tension-meter-trummeter-range-3-800-hz
store_origin: HR
region: Croatia
---

# ±5% accuracy 3-800 Hz wide range Red LED frequency sensor BTM-400Plus Belt Tension Meter / Trummeter, Range 3 - 800 Hz

**Brand:** checkline
**Price:** € 3128.45
**Availability:** ✅ In Stock

## Summary

> 🔧 Master belt tension like a pro — precision meets portability!

## Quick Answers

- **What is this?** BTM-400Plus Belt Tension Meter / Trummeter, Range 3 - 800 Hz by checkline
- **How much does it cost?** € 3128.45 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/520625571-btm-400plus-belt-tension-meter-trummeter-range-3-800-hz)

## Best For

- checkline enthusiasts

## Why This Product

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

## Key Features

- • **Compact & User-Friendly:** Hand-held design with two sensor options for easy one-handed or tight-space measurements.
- • **Global Language Support:** Multi-language menu (English, German, Spanish, French, and more) for effortless international use.
- • **Noise-Proof Performance:** Ruby red LED sensor ensures reliable readings unaffected by ambient noise or magnetic fields.
- • **Versatile Compatibility:** Works seamlessly with flat, V, and ribbed belts made of rubber, leather, fabric, and composites.
- • **Precision at Your Fingertips:** Measures belt tension from 3 to 800 Hz with ±5% accuracy for flawless diagnostics.

## Overview

The BTM-400PLUS Belt Tension Meter is a German-engineered, hand-held device that measures static belt tension by detecting natural frequency (3-800 Hz) using a pulsed red LED sensor. It delivers ±5% accuracy, supports multiple belt materials, and offers dual sensor options for versatile, noise-resistant operation. Ideal for professionals demanding quick, precise tension diagnostics across global applications.

## Description

The CHECK-LINE BTM-400PLUS accurately measures the static tension of flat, V and ribbed belts of rubber, leather, fabric and composite materials by measuring the natural frequency (Hz) of a segment of the belt that has been tapped and then converting it into tension units of newtons (N) or pounds force (lbf). The instrument uses a pulsed ruby red light source to measure the natural frequency of the vibrating belt. Unlike competitive models, the BTM-400PLUS is NOT affected by ambient noise, providing quick reliable results in all production and field applications. Features Includes two (2) separate Sensors – a plug-in type for one-handed operation and a cable-connected type for measuring belts with limited access space Compact, easy-to-use design Readings unaffected by nearby magnetic fields or noise Displays tension in newtons (N) or pounds force (lbf) or natural frequency in Hertz (Hz) - selectable Displays Menu in English, German, Spanish, Portuguese, French or Italian & others - selectable [custom1] Measuring Range* 3 - 800 Hz Accuracy** ± 5% or better Sensing Distance*** 0.200" - 1.6" (5 - 40 mm), typically (2.5"/60 mm max, depending upon ambient light & surface of belt to be measured) Casing ABS Plastic Display 2 line LCD, 16 character per line Input Range free span length: up to 9.990 m belt mass: up to 9.999 kg/m Belt Density Belt Density (d = kg/m or lb/ft) Belt Span Min, approx. 10 cm (4 inch) Max, no maximum (as long as belt will oscillate) Warranty 1 Year Light Source Red LED Light Size at 50mm - 6mm Square at 150mm - 15mm Square Power Supply 9V battery Metric Units MASS must be entered in kg/meter SPAN in "meters" English Units MASS must be entered in lbs/foot SPAN in "inches" Country of Origin Germany [/custom1]

## Features

- Complete Kit - This belt tension tester kit includes gauge, sensors, battery, manual, & hard case.
- Quick & Accurate Results - Tension tool for measuring static tension of flat, V, & ribbed belts!
- Wide Range 10-800 Hz - Choose Checkline belt tension gauge for vehicles, machines, & equipment!
- Hand-Held Design - No need for bulky & complicated equipment when you use Checkline tension checker.
- For Various Materials - This digital belt tension gauge works with rubber, leather, fabric, & more.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0054J799M |
| Batteries Required? | No |
| Batteries included? | No |
| Colour | Multicolor |
| Date First Available | 6 Aug. 2014 |
| Item Package Quantity | 1 |
| Item Weight | 0.28 g |
| Manufacturer | Checkline |
| Manufacturer reference | BTM-400PLUS |
| Material | PLA_(Polylactic_Acid), ABS_(Acrylonitrile_Butadiene_Styrene), PE_(Polyethylene), Plastic |
| Number of Pieces | 1 |
| Package Dimensions | 22.8 x 19.5 x 6.6 cm; 0.28 g |
| Part number | BTM-400PLUS |
| Power source type | Battery Powered |
| Size | One Size |
| Style | Modern |

## Product Details

- **Brand:** Checkline
- **Colour:** Multicolor
- **Item weight:** 0.01 Ounces
- **Power source:** Battery Powered
- **Style:** Modern

## Images

![BTM-400Plus Belt Tension Meter / Trummeter, Range 3 - 800 Hz - Image 1](https://m.media-amazon.com/images/I/61+pfC-P-SL.jpg)
![BTM-400Plus Belt Tension Meter / Trummeter, Range 3 - 800 Hz - Image 2](https://m.media-amazon.com/images/I/71k6OsQBYXL.jpg)
![BTM-400Plus Belt Tension Meter / Trummeter, Range 3 - 800 Hz - Image 3](https://m.media-amazon.com/images/I/716b5ttWbPL.jpg)
![BTM-400Plus Belt Tension Meter / Trummeter, Range 3 - 800 Hz - Image 4](https://m.media-amazon.com/images/I/81G+nFtwEGL.jpg)
![BTM-400Plus Belt Tension Meter / Trummeter, Range 3 - 800 Hz - Image 5](https://m.media-amazon.com/images/I/71-2qItDtDL.jpg)

## Frequently Bought Together

- Checkline Belt Tension Checker for Vehicles & Machines - Quick & Accurate Results, 100-800 Hertz
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**Shop now:** [https://www.desertcart.hr/products/520625571-btm-400plus-belt-tension-meter-trummeter-range-3-800-hz](https://www.desertcart.hr/products/520625571-btm-400plus-belt-tension-meter-trummeter-range-3-800-hz)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-10*