New Clegg Impact Tester / Clegg Decelerometer 0.5 kg with Hard Case
for Golf Greens

Click here for model for Sports Turf and Athletic Fields

The 0.5 kg Clegg Impact Tester is a professional instrument used to determine hardness on all types of areas - Readings in Gravities (Gmax), CIT's and F355 Equivalent

New for 2021 - The Clegg Impact tester has a wireless bluetooth sending unit and GPS enabled tablet, data logging and mapping. The NEW PNCLEGG-S-2.25-A- Clegg Impact Tester 2.25 kg model reads out from 0 to 150 Gravities, 0 to 15 CIT's or 0 to 218 - F355 GMax equivalent readings and has a better accuracy range (+/- 1% or 1.5 G Accuracy) as compared to the 0-500 Gravity unit (+/- 1% or 5 G Accuracy) for testing soft surfaces like golf greens. Also, the 0.5 kg size will not damage the putting surface.

The 0.5 kg Clegg Impact Tester unit is a professional instrument to determine hardness specifically on Golf Greens, Golf Green approaches and bunker sand. These reading will ensure consistant playablity and uniformity from green to green.

Instruction Manual and App comes with conversion formula to convert readings to F355 equivalent readings. Note the 150 g maximum reading on this unit is sufficient for maximum impact readings in the ASTM F355 range after using the conversion formula included in the Turf-Tec Instruction Manual. 200 g's on F355 Impact Tester = 135 g's on Clegg Impact Tester.

The principle behind the Clegg Impact Soil Tester, also called the Clegg Hammer and Clegg Decelerometer, is to obtain a measurement of the deceleration of a free falling mass (Hammer) from a set height onto a surface under test to determine its hardness. The impact of the Hammer produces an electrical pulse, which is converted and displayed on the GPS enabled tablet in units of gravities "G-max", tens of gravities "CIT", or F355 Equivalent units. Reference ASTM test methods ASTM 1936, ASTM F355, D5874 and F1702.

The standard test protocol for sports field testing is to drop the hammer one consecutive time on the test area result. The Clegg offers the convenience of rapidly scanning compaction variation over large areas.

Available in following models

0.5 kg - Used for soft turf, sand areas and golf greens (0 to 500 Gravities)

2.25 kg - Used for surfaces consisting of natural or synthetic turf (football, baseball, soccer fields, playgrounds, pitches, horse tracks, and golf greens) (0 to 500 Gravities) (+/- 1% or 5 G Accuracy)

2.25 kg-A - Used for surfaces consisting of natural or synthetic turf (football, baseball, soccer fields, playgrounds, pitches, horse tracks, and golf greens) (0 to 150 Gravities) (+/- 1% or 1.5 G Accuracy)

4.5 kg - Used for surfaces such as preconstructed soils, trench reinstatement, bell holes, and foundations

10 kg - Used for flexible pavement, aggregate road beds, trench reinstatement, bell holes, and foundations

20 kg - Used for surfaces such as flexible pavement, aggregate road beds, trench reinstatement, bell holes, and foundations

Simple and quick test procedure

The 0.5 kg Clegg test procedure is very rapid and can easily be performed Clegg Impact Tester / Clegg Decelerometer shown with Turf-Tec Level. The 0.5 kg Clegg test procedure is very rapid and can easily be performed by site personnel with minimal training. Each test can be completed in less than 30 seconds and the results are immediate. by site personnel with minimal training. Each test can be completed in less than 30 seconds and the results are immediate.

Select a fairly level surface.

Set the guide tube into position. Secure by placing a foot on the tube's base flange and steady with the lower leg and knee.

The tablet app is placed in the test mode.

The Hammer is raised to the drop height designated by the top stop.

The level is centered.

The Hammer is released allowing it to fall freely.

Clegg Impact Tester / Clegg Decelerometer Control unit The Gravities value (Gmax), CIT value or F355 equivalent reading is displayed and is instantly saved, along with the GPS coordinates, into the Clegg app.

Move to the next test site and repeat the test procedure.

Clegg 2019 Screen on Tablet with GPS

Clegg shown with Turf-Tec hard case

Clegg shown with Turf-Tec optional hard case

The 0.5 kg Clegg Impact Tester is a professional instrument used to determine hardness on all types of areas from Golf Greens, approaches and bumber sand for uniform playability.