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SUNDOO Spring Tester SD-50-500

The SD Series digital spring tester is a specialized tool used in a variety of disciplines for evaluating spring extension/compression, push/pull, and other functions to the maximum extent possible.

  • Peak holding and auto-release function: Capturing the peak value in the test, displaying it on the display for 1 to 10 seconds, then releasing the value and getting ready for the next peak;
  • Comparing function: The gadget can judge the measured result as Go (Green pilot lamp)/NG (Red pilot lamp) based on the initial input of the tolerance limit (Max/Min);
  • Automatic power-off function: You can choose the power-off time (1–60 minutes); Memory performance: Calculate the average from 10 testing data; RS-232C output: The connector for communication is provided by the output;
  • Printing 10 sets of tested data, the maximum and minimum values, the average value, and the qualified and unqualified values inside the printer.

Description

The SD Series Digital Spring Tester is a specialized instrument developed for accurate testing of spring compression, extension, push, and pull forces. Covering models from SD-10 up to SD-5000, the system provides a broad measurement capacity with fine load resolution and controlled test travel options. It is designed to support quality inspection, product verification, and R&D testing where repeatable and reliable force measurement is required. With selectable platen sizes and multiple travel configurations, the tester can be adapted to different spring sizes and test setups.

The tester includes intelligent functions such as peak hold with timed auto-release, tolerance comparison with GO/NG indicator lights, and automatic power-off settings to improve efficiency and usability. It can store multiple test results, calculate averages, and output data through RS-232C for reporting or system integration. With ±1% accuracy and stable powered operation, the SD Series is suitable for both workshop and laboratory environments where consistent spring performance verification is critical.

Features

  • Model capacity range: 10N to 5000N

  • Load resolution from 0.001N up to 1N depending on model

  • Test travel options: 65mm / 95mm / 150–200mm

  • Distortion resolution: 0.01 mm

  • Multiple platen sizes: φ30mm / φ49mm / φ108mm

  • Peak value hold with adjustable display time (1–10 seconds)

  • GO/NG tolerance comparison with indicator lights

  • Average calculation from up to 10 test results

  • Built-in data memory and print support

  • RS-232C communication output

  • Measuring range: 5% – 100% FS

  • Accuracy: ±1%

  • Auto power-off setting (1–60 minutes)

  • Stable AC power operation (220V ±10%)

  • Compact bench-top structure with multiple size options

Specifications

Model SD-10 SD-20 SD-30 SD-50 SD-100 SD-200 SD-300 SD-500 SD-1000 SD-2000 SD-5000
Capacity 10 N 20 N 30 N 50 N 100 N 200 N 300 N 500 N 1000 N 2000 N 5000 N
Load Resolution 0.001 N 0.002 N 0.01 N 0.01 N 0.02 N 0.05 N 0.1 N 0.1 N 0.2 N 0.5 N 1 N
Test Travel 65 mm 95 mm 150 mm
Displacement Resolution 0.01 mm
Platen Diameter φ30 mm φ49 mm φ108 mm
Max Free Length Testable 65 mm 95 mm 200 mm
Measuring Range 5% ~ 100% FS
Accuracy ±1% (within ±1%)
Power Supply 220 V ±10%, 20 W
Dimension (W × D × H) 300 × 235 × 600 mm 300 × 235 × 620 mm 490 × 300 × 920 mm
Weight (approx.) 13.2 kg 17.5 kg 19.1 kg 19.1 kg 20.8 kg 47.5 kg

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