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Leeb Hardness Tester

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Leeb hardness tester DHT-300Cplus/300Dplus/300D

DHT-300Cplus

  • Pocket size, easy to operate
  • High contrast OLED display
  • High accuracy +/-4HL (0.5% at 800HL)
  • Conveniently exchange between impact device D and DL
  • Automatic orientation correction
  • Work with Mini-printer thru Bluetooth (DHT-310 series)

More details

Features Leeb hardness tester :

  • Pocket size, easy to operate
  • High contrast OLED display
  • High accuracy +/-4HL (0.5% at 800HL)
  • Conveniently exchange between impact device D and DL
  • Automatic orientation correction
  • Work with Mini-printer thru Bluetooth (DHT-310 series)
  • Based on the hardness HL value, conversion to HRB, HRC, HV, HB and HS hardness scale
  • USB interface for both recharging and data transfer to PC
  • Internal memory in a batch of 1250 average readings
  • Lower and upper limit setting
  • Work on 3.7V rechargeable lithium battery with working more than 16 hours continuously
  • Auto shutdown after 5 minutes
  • Conforming to ASTM A 956

Technical Specification Leeb hardness tester:

Hardness Parameter HL, HRC, HRB, HV, HB,HS 
Measuring Range   See table 1
Display 112 x 64 OLED
Display functions D  Hardness Scale, Hardness Value, average value, impact direction, Max/Min value, Material, battery
Accuracy  Within +/- 0.5% (at HLD=800)
Memory  1250 group
Standard Impact device D
Optional Impact Device DL / C
Output  USB 
Testable work piece Thickness coupled:  Minimum 3 mm or more (Except with Impact device G:10mm) Mass: 5kg or more  (2-5kg on solid support ,﹤2kg with couplant paste) Surface roughness: Ra 10 Radius (convex/concave): Rmin=30mm or more (﹤30mm with support ring ) Test Points: 5mm or more from the edge of the sample, 3mm or more to each of the tested points.
Battery type 3.7 V rechargeable lithium-battery
Operating temperature -20℃ ~ +50℃
Dimensions 158 x 41 x 26 mm
Weight 120g
Material HL HRC HRB HB HS HV
ST & Cast ST 300-900 20.0-68.0 38.4-99.5 80-647 32.5-99.5 80-940
CWT Steel 300-840 20.4-67.1       80-898
Stainless 300-800 19.6-62.4 46.5-101.7 85-655   85-802
GC Iron 360-650     90-334    
NC Iron 400-660     131-367    
Cast Alum. 174-560     20-159    
Brass 200-550   13.5-95.3 40-173    
Bronzes 300-700     60-290    
Copper 200-690     45-315    

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