Built to order. Standard lead time 2-3 weeks.
This tester can accommodate larger springs (up to 6” tall) and test with greater accuracy than our ECT.
- 11 – 750lb load capacity
- Standard 6″ stroke
- Up to .0005″ length resolution
This tester can accommodate larger springs (up to 6” tall) and test with greater accuracy than our ECT. In addition, this tester is upgradeable with more options like the Micro-Length Adjust with length stops, an RS 232 port or single or double length stops. The tester has a two-line backlit LED display of force and length and has deflection compensation for accurate readings at all times. It has a rugged cast aluminum and steel frame, a precision rack and pinion drive with adjustments for wear, and convenient hand operation to apply force and adjust length. It includes standard length lock and mechanical overload stops to protect the tester from damage.
Micro Length Adjust
Make extremely fine length adjustments and utilize two rigid compression stops built right in to the assembly (the hand operating lever has been removed in this photo)
LED Force / Length Display
Two-line LED display of force and length and has deflection compensation for accurate readings.
CDHT Back View
RS 232 and USB Data Output ports
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.
Try our software for “Spring Testing Data at Your Fingertips”. With Larson System’s SDC Software, your spring testing data can be accessed, stored and manipulated as it is generated. Store specifications for different parts, load a set of parameters and clearly see which springs are out of spec using the on-screen graphical representation of the testing results. Save and print results or open the results file in Microsoft Excel. You have complete control of your testing data.
|Standard Resolution||High Resolution*|
|0-100% FS||0-20% FS||20-100% FS|
|11 lb||0.005 lb||0.0005 lb||0.005 lb|
|5 kg||0.002 kg||0.0002 kg||0.002 kg|
|49 N||0.02 N||0.002 N||0.02 N|
|110 lb||0.05 lb||0.005 lb||0.05 lb|
|50 kg||0.02 kg||0.002 kg||0.02 kg|
|489 N||0.2 N||0.02 N||0.2 N|
|750 lb||0.5 lb||0.05 lb||0.5 lb|
|340 kg||0.2 kg||0.02 kg||0.2 kg|
|3,336 N||2 N||0.2 N||2 N|
|Accuracy = ± Full Scale Resolution x 2
*Requires High Resolution Force option 050-0000-0107-00
|CDHT - 11 lb Compression Digital Hand Tester||050-0000-0055-00||Get a Quote|
|CDHT - 110 lb Compression Digital Hand Tester||050-0000-0056-00||Get a Quote|
|CDHT - 750 lb Compression Digital Hand Tester||050-0000-0057-00||Get a Quote|
|High Resolution Force (10X Resolution from 0-20% FS), DHT||050-0000-0107-00||Get a Quote|
|Digital Length Precision Upgrade (0.0005 Res, ± 0.001 Acc)||025-0000-0488-00||Get a Quote|
|Micro Length Adjust with Built-in Stops (CDHT, DHT)|
Part Number: 025-0000-0407-02
Make extremely accurate length adjustments, as well as utilize two extremely rigid compression / extension stops built right in to the assembly.
|025-0000-0407-02||Get a Quote|
|MicroAdjust Wrenchless Stop Assembly||025-0000-0676-00||Get a Quote|
|RS232 / USB output, DHT Family||050-1000-0064-00||Get a Quote|
|Solid Height (Coil Bind) Protection Plate - 2" Ø platorms||018-0000-4358-00||View Product|
|Platforms - 4" Ø (Pair for 5/16-18 Mount)|
Platforms – 4″ Ø
Part Number: 025-0000-0191-00 A
For testing larger diameter compression parts.
|025-0000-0191-00||Get a Quote|
|Thru-Rod Support Kit (1/16 to 1/8" Ø x 6")|
Thru-Rod Support Kit (1/16 to 1/8″ Ø x 6″)
Part Number: 025-0000-0225-00
Includes rods: 1/16, 3/32 & 1/8″ Ø x 4″ long, accompanying plates with matching holes, as well as upper and lower plates without holes.
|025-0000-0225-00||Get a Quote|
|4" Ø Platform / Thru-Rod Support Kit (1/16 to 11/16" Ø ID x 8")|
4″ Ø Platform / Thru-Rod Support Kit (1/16 to 11/16″ Ø ID x 8″)
Part Number: 025-0000-0485-00
This kit is more flexible than other thru-rod options and can accommodate larger thru-rods. In addition, springs up to 4″ in diameter can be tested with the over-size platforms.
Includes rods: 1/16″ to 11/16″ x 8″ long, and accompanying plates with matching holes. 4″ Ø plate can double for testing springs with larger diameter.
NOTE: Deflection compensation is calibrated at the center of the platforms. The length error would vary depending on the load and the location of the load. A centered load is always best and will read accurately, to within ± 0.001″ (0.025 mm) of the actual length. A large off-center load near the edge of the extended platform may be off by up to 0.008″ (0.2 mm).
Installation & Use
|025-0000-0485-00||Get a Quote|
|Single Stop Rod|
Single Stop Rod
Part Number: 025-0000-0293-00
One compression test stop only.
|025-0000-0293-00||Get a Quote|
|Double Stop Rods|
Double Stop Rods
Part Number: 025-0000-0333-00
Two compression test stops, or one compression test stop and one extension test stop.
|025-0000-0333-00||Get a Quote|
|NiCad Rechargeable Battery (4-8 hr life)|
NiCad Rechargeable Battery
Part Number: 025-0000-0294-00
Add an internal rechargeable battery for easy portability. A fully charged battery lasts approximately 8 hours.
|025-0000-0294-00||Get a Quote|
|Dust Cover - ECT, CDHT, CDHT w/Microadjust|
Part Number: 059-1000-0026-00
|059-1000-0026-00||Get a Quote|
|Vibration Damping Pad|
Vibration Damping Pad
Part Number: 025-0000-0226-00
Foam Vibration Damping Pad
|025-0000-0226-00||Get a Quote|
|Air Vibration Damping Table|
Air Vibration Damping Table
Part Number: 025-0000-0288-00
The Air Vibration Damping Table allows you to make very accurate force measurements in normal industrial environments that have floor or building transmitted vibrations. These vibrations may be induced by industrial equipment, local car, truck or rail traffic and in some cases by people walking by. The Air Vibration Damping Table reduces the magnitude of vibration by 10 to 100 times, making it possible to accurately measure forces at very light loads in environments that would otherwise be impossible. The table should be considered for applications with forces less than 10 lb and is highly recommended for applications with forces less than 2 lb.
Air Vibration Damping Table Setup:
|025-0000-0288-00||Get a Quote|
|Rubber Mounting Foot Upgrade||025-0000-1310-00||Get a Quote|
|Inkjet Printer (Includes Cable / Adapter 025-0000-0458-00)|
Inkjet Printer (Includes Cable / Adapter 025-0000-0458-00)
Part Number: 025-0000-0464-00
Inkjet printer prints single feed 8.5×11″ paper. Epson Stylus C88+ inkjet printer. Laser sharp text. If you wish to use your own printer with an RS 232 equipped product, you may choose to purchase only the Parallel to RS 232 Adapter Cable.
|025-0000-0464-02||Get a Quote|
|RS 232 to Parallel Printer Cable / Adapter|
RS 232 to Parallel Printer Cable / Adapter
Part Number: 025-0000-0458-00
Connect any parallel printer to any RS 232 device. These cables are included with our InkJet Printer.
|025-0000-0458-01||Get a Quote|
|SSS - Statistical & Spreadsheet Interface Software||050-0000-0075-00||View SSS Product|
|Spring Data Collector Software (for use with DHT family testers)||050-1000-0060-01||View SDC Product|
|Power Supply, 100-240 VAC 50-60 Hz (USA Plug)||025-1000-0396-00||Get a Quote|
|Power Supply, 100-240 VAC 50-60 Hz (International Plugs)||025-1000-0396-04||Get a Quote|