--- product_id: 520625571 title: "BTM-400Plus Belt Tension Meter / Trummeter, Range 3 - 800 Hz" brand: "checkline" price: "€ 2286.22" currency: EUR in_stock: true url: https://www.desertcart.pt/products/520625571-btm-400plus-belt-tension-meter-trummeter-range-3-800-hz store_origin: PT region: Portugal --- # ±5% accuracy 3-800 Hz wide range Red LED frequency sensor BTM-400Plus Belt Tension Meter / Trummeter, Range 3 - 800 Hz **Brand:** checkline **Price:** € 2286.22 **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?** € 2286.22 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/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 | | Brand | Checkline | | Colour | Multicolor | | Item Weight | 0.01 Ounces | | Manufacturer | Checkline | | Measurement Type | Hz | | Power Source | Battery Powered | | Style Name | 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) ## Frequently Bought Together - Checkline Belt Tension Checker for Vehicles & Machines - Quick & Accurate Results, 100-800 Hertz - XFasten Wire Harness Tape, 3/4-Inch x 90 Feet, High Temp Wiring Loom Harness, Self-Adhesive Felt Cloth Electrical Tape for Automotive Engines, Noise Dampening, and Cable Protection - RED WOLF Wiring Harness Tape High Temp Wire Cable Loom Self-Adhesive Fabric Tape for Electrical Automotive Engine Harness Wrap Protection Noise Damping Cables Fixed 3/4 Inch x 50 FT 5 Rolls --- ## 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.pt/products/520625571-btm-400plus-belt-tension-meter-trummeter-range-3-800-hz](https://www.desertcart.pt/products/520625571-btm-400plus-belt-tension-meter-trummeter-range-3-800-hz) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-09-18*