The DHT-20 is an advanced portable hardness tester, characterized by its high accuracy, wide measuring range and simplicity of operation. It’s designed to measure the hardness of ordinary metals and is widely used in quality and test and measurement laboratories in industries such as petroleum, chemical processing, machinery, heat treating, and electric power.
The DHT-20 uses the Leeb Hardness testing procedure. To determine the target’s Leeb hardness value, a parameter designated HL, is determined by using the plungers rebound velocity and an algorithm in the DHT-20. These can be displayed in a variety of units. The operator’s manual includes a hardness table of typical industrial materials as a reference guide.
Measurement: Leeb hardness measurement
Measurement Accuracy: ±0.5%
Relative Repeatability Accuracy: ±0.8%
Memory: 1250 readings
Display: 112 x 64 pixel LCD
Hardness Scales: HL/HRB/HRC/HV/HB/HS
Materials: Most common metals including; Steel/cast steel, alloy tool steel, stainless steel, grey cast iron GG, nodular cast iron, cast aluminum, copper-zinc brass, copper aluminum, wrought copper
Display Options: Hardness scale, hardness value, times, average indicator and average value, impact direction, type of impact device connected, memory reference, date, time, battery power consumption
Auto Off: 2 minutes of no activity
Working Environment: 0 to 45°C (32 to 113°F)
Dimensions: 108 L x 62 W x 25 mm D (4.25 x 2.44 x 1")
Display: 48 L x 28 mm W (1.88 x 1.12")
Weight: 180 g (6.4 oz) including impact device and printer
Power Source: 2 “AAA” batteries (included)