Cookies

We use third-party cookies to improve our services.

Cookie Notice
Email
Reg.
REGISTER your dmš equipment and enjoy
the 5 years limited warranty*
on the electronic unit.
*See Demeq SRL warranty conditions

QH Family

Portable Metal Hardness Testers

Model Comparison Table

To make it easier for you to choose the right metal hardness tester for your application and needs, we have summarized the salient and distinctive features of each model and its range of applications.

QH family instruments

Slide the table horizontally to fully display its content.

Models

Heavy Duty

Method

Devices / Probes

Auto angle

Data output

Memory

DataCenter

dmq QH7 Series electronic unit    QH7 L
Leeb
D, DC, DL, C, G, E
USB
RS232
32000
   QH7 U
UCI
UCI probes
   QH7 C
Leeb / UCI
D, DC, DL, C, G, E, UCI probes
dmq QH5 Series electronic unit    QH5 D
Leeb
D / DC
USB
RS232
32000
   QH5 G
G
   QH5 M
D, DC, DL, C, G, E
   QH5 U
UCI
UCI probes
dmq QH2 Series electronic unit    QH2 S
Leeb
D / DC
None
Without memory
   QH2 DLS
USB
1000
   QH2 P
None
Without memory
   QH2 DLP
USB
1000
NOTES
  • QH2 S and QH2 DLS models do not include a reference test block.
  • QH7 L, QH7 C and QH5 M models include a type D impact device. All other impact device types are optional.
Available impact devices and UCI probes

dmq impact devices and UCI probes include CalTag technology, which allows them to be interchanged without recalibration. CalTag is a dmq exclusive technology.

GyroTag technology, exclusive to the 7 Series, combines automatic impact angle detection and correction with built-in calibration. Together, they make your work easier and faster while ensuring accurate measurements even when swapping devices.

Impact devices - Leeb
Type D impact device

General use (universal) impact device that offers the widest ranges in all hardness units and available materials.

Impact energy: 11Nmm

Length: 147mm / 5.78in

Weight: 75g / 2.64oz

Compatible models:
QH7 L / QH7 C
QH5 D / QH5 M
QH2 S / QH2 DLS / QH2 P / QH2 DLP

Type D impact device
Type DC impact device

Type D impact device with a short body that is ideal for measurements in reduced spaces.

Impact energy: 11Nmm

Length: 86mm / 3.38in

Weight: 50g / 1.76oz

Compatible models:
QH7 L / QH7 C
QH5 D / QH5 M
QH2 S / QH2 DLS / QH2 P / QH2 DLP

Type DC impact device
Type DL impact device

Features a tip that is 50 mm long and has a diameter of 4 mm making it ideal to measure in hard to reach places such as grooves and gears.

Impact energy: 11Nmm

Length: 202mm / 7.95in

Weight: 100g / 3.52oz

Compatible models:
QH7 L / QH7 C
QH5 M

Type DL impact device
Type C impact device

A low impact energy that also produces a smaller indentation makes this impact device ideal for superficial heat treatment and small part measurements.

Impact energy: 3Nmm

Length: 141mm / 5.55in

Weight: 75g / 2.64oz

Compatible models:
QH7 L / QH7 C
QH5 M

Type C impact device
Type G impact device

A greater impact energy allows measurements on rough surfaces with little preparation. Recommended for large, founded and forged parts.

Impact energy: 90Nmm

Length: 254mm / 10in

Weight: 250g / 8.81oz

Compatible models:
QH7 L / QH7 C
QH5 G

Type G impact device
Type E impact device

Uses a synthetic diamond ball allowing high hardness measurements (up to 1200 HV). This is the best option to measure hardened steel or parts with similar treatments.

Impact energy: 11Nmm

Length: 155mm / 6.10in

Weight: 80g / 2.82oz

Compatible models:
QH7 L / QH7 C
QH5 M

Type E impact device
UCI probes
10N UCI probe

Ideal to measure superficial hardness, polished surfaces and small parts with a good finish.

Surface roughness: Maximum roughness Ra 5μm according to ASTM A1038

Compatible models: QH5 U

10N UCI probe
50N UCI probe

Measure induction or cemented treated parts such as crankshafts, gears, welds and heat affected zones.

Surface roughness: Maximum roughness Ra 10μm according to ASTM A1038

Compatible models: QH5 U

50N UCI probe
98N UCI probe

Recommended for use in founded parts, weld seams and heat affected zones even in unmachined surfaces.

Surface roughness: Maximum roughness Ra 15μm according to ASTM A1038

Compatible models: QH5 U

98N UCI probe

Slide the table horizontally to fully display its content.

Material

D

DC

C

G

DL

E

UCI

Steel and cast steel
  Brinell (HB) 80-647 80-647 80-683 90-646 80-647 83-663 95-500
  Vickers (HV) 80-940 80-940 80-996 - 80-940 84-1211 100-940
  Rockwell C (HRC) 20-68 20-68 20-70 - 20-68 22-71 20-68
  Rockwell B (HRB) 38-99 38-99 - 48-100 38-96 - 55-100
  Rockwell A (HRA) - - - - - 61-88 -
  Shore (HS) 32-99 32-99 32-100 - - 36-103 32-97
  Rm (N/mm2) 275-2194 275-2194 275-2194 305-2194 275-2194 283-2195 320-2190
Alloy tool steel
  Vickers (HV) 80-898 80-898 - - - 82-1009 -
  Rockwell C (HRC) 20-67 20-67 - - - 22-70 -
Stainless steel
  Brinell (HB) 85-655 85-655 - - - - -
  Vickers (HV) 85-802 85-802 - - - - -
  Rockwell C (HRC) 20-62 20-62 - - - - -
  Rockwell B (HRB) 46-101 46-101 - - - - -
Grey cast iron
  Brinell (HB) 93-334
90-664*
93-334
90-664*
- 92-326 - - -
  Rockwell C (HRC) 21-59* 21-59* - - - - -
  Vickers (HV) 90-698* 90-698* - - - - -
Spheroid iron
  Brinell (HB) 131-387
95-687*
131-387
95-687*
- 127-364 - - -
  Rockwell C (HRC) 21-60* 21-60* - - - - -
  Vickers (HV) 96-724* 96-724* - - - - -
Cast aluminium
  Brinell (HB) 30-165 30-165 33-167* 32-168* 21-187* 46-176* 40-160
  Vickers (HV) 43-193* - - - 21-191* - 44-189
  Rockwell B (HRB) - - - - - - 28-91
Brass
  Brinell (HB) 40-173 40-173 - - - - -
  Rockwell B (HRB) 13-95 13-95 - - - - -
Bronze
  Brinell (HB) 60-290 60-290 - - - - -
Wrought copper
  Brinell (HB) 45-315 45-315 - - - - -

*The range is achieved with the QH7 Series equipment.

dmq DataCenter

It's our acquisition software for PC that allows to receive, process and export the data stored in our equipment with datalogger.

DataCenter is available for download from our website at no additional cost.

More information and Download
DataCenter software for PCs with OS Windows

I am Quokke, the dmq mascot.
Choose us and be as happy as I am!

See products
COPYRIGHT © DEMEQ S.R.L.
ALL RIGHTS RESERVED.
Go up