TQ-4C Special UCI hardness tester and probe for non-destructive testing
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TQ-4C Special - UCI hardness tester

UCI hardness testers

High-precision hand-held instrument engineered for demanding production and field conditions, delivering reliable non-destructive testing capabilities. Designed for assessing production quality, it finds utility across various industries such as metallurgy, mechanical engineering, aircraft construction, shipbuilding, atomic industry, and oil and gas.

Operating on the Ultrasonic Contact Impedance (UCI) method, this hardness tester is specifically tailored for measuring the hardness of carbon construction steels across fundamental hardness scales such as Brinell (HB), Rockwell (HRC), and Vickers (HV).

Application

  • Carbonaceous and structural steels.
  • Items with surface-hardened layers suach as cementation, nitride hardening, high frequency current hardening.
  • Heat-proof, corrosion-proof, and non-corrosive steels.
  • Plated coatings (e.g., chrome), overlaying.
  • Items with complicated configurations.



Operational advantages


TQ-4C Special UCI hardness tester with probe adapter
  • Stable readings independent of applied force and duration of pressing.
  • Easy measurement in hard-to-reach areas.
  • Ultra-small control area (from 1 mm).
  • Control in slots and blind holes from 5 mm (unique feature compared to rival devices).
  • Invisible print on mirror surfaces.
  • Low sensitivity to surface curvature, thickness, and weight of the product.

Features

  • Impact-, dust-, and water-proof housing.
  • Bright color display for operation in sub-zero temperatures, remaining visible under varying lighting conditions.
  • Signalization of threshold readings exceedance.
  • Unique system for statistical data processing and averaging of readings.
  • Swift adjustment of readings and programming of additional calibrations to basic scales using two or fewer standard blocks.
  • Flexible device memory for recording and analyzing readings.
  • Programming of additional scales calibrations by two or fewer standard test blocks.
  • Quick programming of additional scales by two to ten standard test blocks.

Probes characteristics


Photo Probe Type/Load Weight/thickness/
surface roughness
of the article
under check

Length/
Diameter

Application
«А» (HV5)
50H/5 kg
1 kg/3 mm/Ra 1,6 145/26 mm Solving of main hardness testing tasks
«H» (HV1)
10H/1 kg
1 kg/2 mm/Ra 0,8 145/26 mm Hardness testing of electroplated coating (chrome, copper, nickel, zinc, tin), thinwalled and small-sized items
«С» (HV10)
100H/10 kg
1 kg/4 mm/Ra 3,2 145/26 mm Hardness testing of items with unprepared surface, large items and heavy-duty equipment
«К» (HV5)
50H/5 kg
1 kg/3 mm/Ra 1,6 76/33 mm Hardness testing of inner surface of tubes, tanks and other hard-to-reach areas
Probe AL «AL» (HV5)
50H/5 kg
1 kg/3 mm/Ra 1,6 190/26 mm Hardness testing in hard-to-reach areas as pinholes, grooves, in-between gear teeth zones (length of tip 65 mm)
Probes variations for UCI hardness testers

Exploitation


TQ-4C Special UCI hardness tester with probe

Requirements

  • Items heavier than 1 kg and thicker than 2 mm require no additional preparation.
  • Items lighter than 1 kg or thinner than 2 mm should be securely fixed using a vice clamp or support plate with fixing paste.
  • Best measurement accuracy achieved on surfaces with a roughness of 1.6 RA.

Hardness testers modes

Measurement mode Readings Using
By basic scales Basic hardness units (HRC, HB, HV) Hardness testing of the bulk of products
By additional calibrations to basic scales By HRA, HRB, HSD scales and ultimate tensile strength Hardness testing of high-alloy steels, special cast iron and nonferrous metals
By additional scales Scales are programmed by the user Special problems solving

The statistical parameters used for processing measurements

  • Maximum, minimum, and mean values.
  • Standard deviation from the mean.
  • Average deviation from user-set values.
  • Number of results outside the upper/lower limit range specified by the user.
  • Maximum deviation from the upper/lower border.
  • Automatic elimination of erroneous results.
  • Comparison of measurement results in series using comparison charts displayed on the hardness tester.

Technical specifications


Characteristic Values
Relative average error at regular calibration  3-5 %
Hardness testing ranges:
Rockwell C 20-70 HRC
Brinell 90-450 HB
Vickers 240-940 HV
Spot diameter on the item surface for probe positioning From 1 mm on flat surface
From 5 mm in a slot
Quantity of possible additional scales calibrations 5 for each scale
Quantity of additional scales 3
Duration of the measurement 2 seconds
Quantity of measurements for average reading calculation 1-99
Memory capacity 12 400 readings
Maximum quantity of named blocks of readings generated in memory 100
Signalization about threshold exceeding Provided
PC connection USB
Power supply Li-ion accumulation battery
Dimensions of hardness tester electronic unit 121x69x41 mm
Weight of electronic unit 0.3 kg
Weight of A-probe 0.3 kg
Operating temperature range -15…+35 °C
Warranty 1 year
TQ-4C hardness tester with variations of probes

Delivery set


Delivery set of TQ-4C Special UCI hardness tester
Elements UCI Hardness tester
TQ-4C
UCI Hardness tester
TQ-4C special
Electronic unit with accumulation battery + +
A-type probe + +
Connecting cable for A-type probe 1 pcs 2 pcs 

Adapter “U4”

  +
Standard test block HRC   +
Charger + +
Operating manual + +
PC cable + +
Soft case + +
Cuff to fix device on arm  + +
Bag for carrying and storing + +

Accessories

  • Replaceable probes of various construction and load.
  • Adapter “U4” for easier probe positioning on complex surfaces.
  • Connection cables.
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