Coil Spring Tester

The Coil Spring Tester is a low cost alternative for high capacity springs. Test up to 1,500 lbs and get good force / length results from this sturdy two-post frame.

  • Backlit digital LCD display of force and length
  • Standard 4″ stroke
  • Standard 0.05″ length resolution

Coil Spring Tester

The Coil Spring Tester is a low cost alternative for high capacity springs. Test up to 1,500 lbs and get good force / length results from this sturdy two-post frame. The CST uses LCD readouts for easy viewing of highly accurate length and force measurements. The length measurement units can be selected to read in inches or millimeters while force measurement is selectable to read in pounds, kilograms, or Newtons. The CST measures flexible items in compression only. Although low in cost, the CST features a high degree of built-in precision and accuracy to assure excellent repeatability and reproducibility.

All of the Larson manual testers have deflection compensation for load cell and frame deflection. Because the testers have compensation with integrated force and length measurements, the length reads accurately at any force. This eliminates the need to use lookup tables to correct for the displayed length error. The Larson length reading is accurate as displayed.

The Coil Spring Tester is made with a rugged two-post steel frame and instrumented with a Larson precision load cell for force, a glass scale for length and our proprietary precision electronics for analysis and display of exact measurements.







Includes Length Deflection Compensation

What is length deflection compensation?
All force/lengh testing devices, regardless of manufacturer, have additional deflection by the load cell and tester frame which occurs as the spring is loaded. If you buy/use a tester without deflection compensation, measurements might include significant length errors.Spring deflection, also known as spring travel or motion, is the action of a compression spring compressing (being pushed), an extension spring extending (being pulled), or a torsion spring winding (being twisted) when a load is applied or released. This is one characteristic (spring deflection) that is measured by a Larson Systems Spring Tester.

Larson Systems has BUILT-IN Length Deflection Compensation so that the user does not have to calculate and apply length corrections. Most competitors do not have length deflection compensation.

With a Larson Systems product, forget about calculating load cell and frame deflection when testing, we’ve got you covered.

Force Specifications

Load Cell
Standard Resolution High Resolution*
750 lb 1 lb 0.5 lb
340 kg 0.5 kg 0.2 kg
3,336 N 5 N 2 N
1,500 lb 2 lb 1 lb
680 kg 1 kg 0.5 kg
6,672 N 10 N 5 N
Accuracy = ± Full Scale Resolution x 2
*Requires High Resolution Force option 050-1000-0014-00

Parts and Accessories


DescriptionPart Number 
Coil Spring Tester 750 lb050-0000-0118-00Get a Quote
Coil Spring Tester 1,500 lb050-0000-0119-00Get a Quote

Accuracy Options

DescriptionPart Number 
High Resolution Force (2X Rs. from 0-100% FS)(CST)050-1000-0014-00Get a Quote

Factory Options

DescriptionPart Number 
RS232 / USB output, DHT family050-1000-0064-00Get a Quote


DescriptionPart Number 
NiCad Rechargeable Battery025-0000-0294-00Get a Quote

Software Options

DescriptionPart Number 
SSS - Statistical & Spreadsheet Interface Software050-0000-0075-00Get a Quote
Spring Data Collector Software (for use with DHT family testers)050-1000-0060-01Get a Quote

RS 232 Options

DescriptionPart Number 
Inkjet Printer (Includes Parallel to 9pin RS 232 Adapter Cable)025-0000-0464-02Get a Quote
RS 232 to Parallel Printer Cable / Adapter (DB9)025-0000-0458-01Get a Quote

Power Supplies

DescriptionPart Number 
Power Supply, 100-240 VAC 50-60 Hz (USA Plug)025-1000-0396-00Get a Quote
Power Supply, 100-240 VAC 50-60 Hz (International Plugs)025-1000-0396-04Get a Quote