Concrete Compression Testing Sensor CM

CM Compressometer　
50000 x 10-6 strain to 33000 x 10-6 strain

The CM compressometer is designed to conduct a strength test. It measures the axial strain on a cylindrical concrete specimen placed in and secured by screws to the inner chamber of this compressometer. It uses a high-sensitivity strain gauge to measure the amount of strain. By multiplying a measurement by a certain factor, the amount of strain can be calculated as a numerical value. Unlike the case of ordinary strain gauges, this compressometer is simple and easy to operate and can be used repeatedly. However, it cannot be used to conduct breaking tests.

CM Compressometer
Features
  • Easy to install
  • Repeated use
  • Easy drawing of stress- strain curve

  • Specifications
    Type Applicable specimen Gauge length Capacity
    CM-10 ø10 x 20 cm 100 mm 50000 x 10-6 strain
    CM-12 ø12.5 x 25 cm 125 mm 40000 x 10-6 strain
    CM-15 ø15 x 30 cm 150 mm 33000 x 10-6 strain

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Dynamic Strainmeters Digital type Smart Dynamic Strain Recorder DC-204R/DC-204Ra

Smart Dynamic Strain Recorder DC-204R / DC-204RaCE

200-kHz high-speed sampling possible in 1-channel mode — connect 8 units at the same time for simultaneous sampling of up to 32 channels.
The DC-204Ra has analog output (±5 V) function for external recorder or automotive ECU.START/STOP button on front allows start of measurement by trigger setting, external trigger, control by external start/stop signal, etc.

Smart Dynamic Strain Recorder DC-204R / DC-204Ra
Features
  • 4-channel configuration with miniature size like postcard
  • 200 kHz sampling (at the fastest in 1-channel mode)
  • Simultaneous 50 kHz sampling for 4 channels
  • Capable of measuring a large strain of up to 80000 x 10-6 strain (with 0.5 V excitation)
  • Data recording in compact flash card of 2 Gbyte capacity
  • Automatic data protection against power failure. When the power is droped unexpectedly, stops measurement and stores data before turning off the power.
  • Data format conforms to DADiSP format
  • External start / stop and external trigger
  • Sensor open-circuit check function
  • USB Interface installed and standard control software supplied

  • Specifications
    Type DC-204R / DC-204Ra
    Measuring object Strain
    DC voltage (with optional CR-4010, CR-4020)
    Thermocouple (with optional TA-01KT)
    Number of channels 4 channels
    Measuring range ±20000 x 10-6 strain (at 2 V excitation)
    ±80000 x 10-6 strain (at 0.5 V excitation)
    Frequency response DC to 10 kHz (-3 dB±1 dB)
    Gauge resistance 120 to 1000 Ω (full bridge)
    Maximum sampling speed 5 μsec (1 ch), 10 μsec (2 ch), 20 μsec (4 ch)
    Analog output
    (DC-204Ra only)    		 Voltage output:  ±5 V (5 kΩ load)  ±1 mA
    Output accuracy:  ±0.3 %FS
    Calibration output: ±1 V (added to the input value)
    External dimensions 84(W) x 42(H) x 157(D) mm
    Weight Approx. 500 g
    Power supply DC 10 to 16 V 0.4 A MAX.

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Crack Displacement Transducers KG-B

KG-B Crack Displacement Transducer　X:-2 to +4 mm　Y:±3 mm

The KG-B crack displacement transducer is used to measure the displacement in two directions simultaneously: the displacement of openings, such as concrete cracks or joints, and the horizontal shear displacement. It is mounted on a structure by bonding with adhesive. Because the fixing jigs are detachable, the transducer can be demounted and set on a different structure. This allows this transducer to be used repeatedly on different structures. In addition, the small-size feature makes this transducer suitable for indoor measurement.

KG-B Crack Displacement Transducer
Features
  • Compact, Light-weight
  • Easy to handle
  • Repeated use

  • Specifications
    Type KG-3B
    Capacity X-direction -2 to +4 mm
    Y-direction ±3 mm
    Rated output X-direction Approx. -1 to +2 mV/V (+4000 x 10-6 strain, -2000 x 10-6 strain)
    Y-direction Approx. 1.5 mV/V (3000 x 10-6 strain)
    Non-linearity 1 %RO
    Temperature range 0 to +40 ℃

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Crack Displacement Transducers KG-A

KG-A Crack Displacement Transducer
±2 mm/±5 mm CE

This displacement transducer is set across a crack on the surface of concrete or across a joint between two concrete blocks to measure the displacement of surface gaps. Its waterproof structure allows this transducer to make stable measurement outdoors over a long period of time. Mounts using an achor bolt (KGF-11) or mounting brackets (KGF-31).
Temperature-integrated model with built-in thermocouple also available.

Protection ratings : IP 65 equivalent

KG-A Crack Displacement Transducer
Features
  • Drip-proof structure
  • Excellent stability over a long period of time
  • High sensitivity, High accuracy
  • Compact, Easy to handle

  • Specifications
    Type Capacity Rated output Non-linearity Temperature range
    KG-2A ±2 mm Approx. 1.5 mV/V (3000 x 10-6 strain) 0.5 %RO -20 to +60 ℃
    KG-5A ±5 mm Approx. 2 mV/V (4000 x 10-6 strain) 1 %RO

    Output polarity

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    Measurement moves in the plus direction with regard to an increase of the opening.

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Reinforcing Bar Meter KSAT-A

KSAT-A Reinforcing Bar Meter　300 N/mm2

The KSAT-A are used to measure stress applied to structural reinforcing bars, and are normally welded at both ends to form part of the reinforcement arrangement. And the meters are with built-in temperature sensor, making possible simultaneous measurement of stress and temperature.

Protection ratings : IP 68 equivalent

 

KSAT-A Reinforcing Bar Meter
Features
  • Temperature measuring function to measure relative temperature
  • Long-term stable measurement
  • Capable of measuring thermal stress

  • Specifications
    Type Capacity Rated output Non-linearity Temperature range
    KSAT-10A 300 N/mm2 Approx. 2.2 mV/V (4400 x 10-6 strain) 1 %RO -20 to +80 ℃
    KSAT-13A
    KSAT-16A
    KSAT-19A
    KSAT-22A
    KSAT-25A
    KSAT-29A
    KSAT-32A

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Dynamic Strainmeters Digital type Multi-channel Dynamic Strainmeter DS-50A

Multi-channel Dynamic Strainmeter DS-50A

Cable-connecting up to 20 units, 50 channels per unit, allows simultaneous sampling measurement of up to 1000 channels. Capable of measuring 100-Hz occurrences at a fastest sampling of 1 kHz. Allows cable connection between devices of as much as 100 m, for wide-area, multi-channel dynamic strain measurement not possible with conventional dynamic strain measuring instruments.

Multi-channel Dynamic Strainmeter DS-50A
Features
  • Simultaneous measurement of 20 sets (1,000 channels) is available at the maximum.
  • 1 kHz sampling at the fastest when 1 set is used.
  • Accommodates mixed strain and voltage units
  • Comes standard with measurement software

  • Specifications
    Type DS-50A
    Number of channels 50 channels
    Strain unit, voltage unit and thermocouple unit can be mixed.
    10 channels / 1 unit
    Synchronization Maximum 20 sets (1,000 points)
    Sampling speed 1 to 10,000 ms *1
    Interface LAN (100 BASE-TX)
    External dimensions 420(W) x 110(H) x 298(D) mm (excluding projected parts)
    Weight Approx. 5 kg

    *1 : The sampling speed is added 1 ms with connecting each one set.

     

    Strain unit
    Number of channels 10 channels
    Gauge resistance Quarter bridge 3-wire system 120 Ω, 350 Ω
    Half bridge system 120 to 1,000 Ω
    Full bridge system 120 to 1,000 Ω
    Bridge excitation DC 2 V
    Measuring accuracy ±0.05 ％FS（at 23±5℃）
    Measuring range ±25000 x 10-6 strain
    Frequency response DC to 100 Hz
    Voltage unit
    Number of channels 10 channels
    Measuring range ±20 V
    Frequency response DC to 100 Hz
    Thermocouple unit
    Number of channels 10 channels
    Measuring range T : -250 to +400 ℃
    K : -210 to +1370 ℃
    J : -200 to +1200 ℃
    Frequency response DC to 10 Hz

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Caisson Method for Measuring Sensor KKA-PB

KKA-PB Caisson skin-friction meter　200kPa to 300kPa

The KKA-PB is a transducer to measure skin friction bearing force with the ground acting on thewall of concrete caisson. The transducer is installed so that the sensing area of the transducer faces thecaisson's wall and measures skin friction bearing force with the ground when settled and fixed.

 

Protection ratings : IP 67 equivalent

 

KKA-PB Caisson skin-friction meter

  • Specifications
    Type Capacity Rated output Non-linearity Temperature range
    KKA-200KPB 200 kPa Approx. 1.5 mV/V (3000 x 10-6 strain) 1 %RO -30 to +70 ℃
    KKA-300KPB 300 kPa Approx. 1.5 mV/V (3000 x 10-6 strain) 1 %RO -30 to +70 ℃

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