DHT 1500
DHT 1500 - Digital Hand Tester

The DHT 1500 is the high-capacity version of our DHT. Use this tester for tension or compression applications.

  • Up to 72″ range (18″ standard)
  • Up to 36″ stroke (13″ standard)
  • Up to 8″ Ø platform (3.5″ standard)

DHT 1500 – Digital Hand Tester

The DHT 1500 is the high-capacity version of our DHT. Use this tester for tension or compression applications. Standard pull lengths of 18” can be increased with optional extended rods to up to 72” to test long parts. It has higher resolution force and length to test with greater accuracy. In addition, this tester is upgradeable with more options like the Micro-Length Adjust with length stops or RS 232 port.

It comes standard with a two-line backlit LED display of force and length with deflection compensation for accurate readings at all times. It has a rugged cast aluminum and steel frame, precision rack and pinion drive with adjustments for wear and convenient hand operation to apply force and adjust length. It includes 2 position stop rods, standard length lock and mechanical overload stops to protect the tester from damage. This tester has a 0.437″ thru-hole standard.


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.

SDC Software Demo

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.

Free Demo

Force Specifications

Load Cell
Standard Resolution High Resolution*
0-100% FS 0-20% FS 20-100% FS
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
1,500 lb 1 lb 0.1 lb 1 lb
680 kg 0.5 kg 0.05 kg 0.5 kg
6,672 N 5 N 0.5 N 5 N
Accuracy = ± Full Scale Resolution x 2
*Requires High Resolution Force option 050-0000-0107-00

Parts and Accessories


DescriptionPart Number 
DHT 1500 - Digital Hand Tester - 1500 lb Capacity050-0000-0101-01Get a Quote

Accuracy and Factory Options

DescriptionPart Number 
High Resolution Force (10X Resolution from 0-20% FS)050-0000-0107-00Get a Quote
Peak Mode050-1000-0010-01Get a Quote
RS232 / USB output050-1000-0064-00Get a Quote
Micro Length Adjust Assembly (2,000 lb capacity)025-0000-0434-00Get a Quote
MicroAdjust Wrenchless Stop Assembly025-0000-0676-00Get a Quote
36" Support Rods for 24" Range025-0000-0442-00Get a Quote
48" Support Rods for 24" Range025-0000-0437-00Get a Quote
60" Support Rods for 48" Range025-0000-0438-00Get a Quote
72" Support Rods for 60" Range025-0000-0442-01Get a Quote
84" Support Rods for 72" Range025-0000-0442-02Get a Quote
Gear Rack Assembly - 18" Stroke (0.437" Thru-Hole)025-0000-0446-03Get a Quote
Gear Rack Assembly - 24" Stroke (0.437" Thru-Hole)025-0000-0446-04Get a Quote
Gear Rack Assembly - 18" Stroke (no Thru-Hole)025-0000-0446-01Get a Quote
Gear Rack Assembly - 24" Stroke (no Thru-Hole)025-0000-0446-02Get a Quote
Gear Rack Assembly - 36" Stroke (no Thru-Hole)025-0000-0446-05Get a Quote

Load Cells

DescriptionPart Number 
110 lb Quick Change Smart Interchangeable Load Cell (3.5" Ø platform)025-0000-0814-04Get a Quote
750 lb Quick Change Smart Interchangeable Load Cell (6" Ø platform)025-0000-0814-09Get a Quote
1,500 lb Quick Change Smart Interchangeable Load Cell (6" Ø platform)025-0000-0814-11Get a Quote


DescriptionPart Number 
Platforms - 8" Ø (5/8 Mounting hole)025-0000-0439-00Get a Quote
Rechargeable Battery, 6V Kit025-1000-0491-00Get a Quote
Thru-Rod Support Kit (1/16 to 1/8" Ø x 6")025-0000-0225-00Get a Quote
Thru-Rod Accessory Kit (1/16 to 3/8" Ø x 8")025-0000-0424-01Get a Quote
Extension Setup Blocks025-0000-0190-00Get a Quote
Pin Extension Hooks025-0000-0250-04Get a Quote
Wire Extension Hooks025-0000-0523-00Get a Quote
Machined Extension Hooks025-0000-0181-00Get a Quote
LSI Wedge Grips025-0000-0428-00Get a Quote
Smooth Jaw Wire Chucks - 100 lb025-0000-0193-00Get a Quote
Serrated Jaw Wire Chucks - 200 lb025-0000-0193-01Get a Quote
Smooth Jaw Wire Chucks - 400 lb025-0000-0193-02Get a Quote
5/16-18 M to 10-32 M/F Thread Adapter018-0000-1718-00Get a Quote
5/16-18 M to M6 M/F Thread Adapter018-0000-1718-01Get a Quote
5/16-18 M to M4 M/F Thread Adapter018-0000-1718-02Get a Quote
Dust Cover - 18" Range Rods059-1000-0016-00Get a Quote
Dust Cover - 24" Range Rods059-1000-0017-00Get a Quote
Dust Cover - 36" Range Rods059-1000-0018-00Get a Quote
Dust Cover - 48" Range Rods059-1000-0019-00Get a Quote
TUL - Twist Under Load050-0000-0099-00Get a Quote

RS 232 Options

DescriptionPart Number 
Inkjet Printer (Includes Cable / Adapter 025-0000-0458-00)025-0000-0464-02Get a Quote
RS 232 to Parallel Printer Cable / Adapter (DB9)025-0000-0458-01Get a Quote


DescriptionPart Number 
SSS - Statistical & Spreadsheet Interface Software050-0000-0075-00Get a Quote
Spring Data Collector Software 050-1000-0060-01Get 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