Waterproof Displacement Transducer

FDP-A Waterproof Displacement Transducer 10mm to 100mm

The FDP-A is a DC operated LVDT which can be measured with not only our TDS series data loggers but DC excitation type dynamic strainmeters and handheld strainmeters. In addition to high output and high response, its waterproof structure and all stainless steel made external parts make this transducer well suited to underwater measurement.

Protection ratings : IP68 equivalent

FDP-A Waterproof Displacement Transducer
Features
  • LVDT type
  • Measurable with our TDS series data loggers
  • Excellent waterproofness (Water pressure:1 MPa)
  • High Response
  • Less susceptible to external electrical conditions
  • High output

  • Specifications
    Type Capacity Rated output Sensitivity
    (x10-6strain/mm)    		 Non-
    linearity    		 Temperature
    range
    FDP-10A 10mm Approx. 5mV/V
    (10000x10-6strain)    		 1000 0.5%RO -10 to +80℃
    (no icing)
    FDP-25A 25mm
    Approx. 7.5mV/V
    (15000x10-6strain)    		 600
    FDP-50A 50mm 300
    FDP-100A 100mm 150

    Output polarity

    Measurement moves in the minus direction when the shaft is pushed inward.

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Network Handheld Strainmeter

Network Handheld Strainmeter TC-35N

The TC-35N is a handheld instrument which captures and processes the digitized strain data from network modules. It can be used for checking the system on site and/or constructing a small measurement system. By adopting low-consumption type network modules, number of connectable modules and extending distance of modules are enlarged drastically and construction of a comparatively larger measurement system is easily enabled.

Network Handheld Strainmeter TC-35N
Features
  • Small, light and easy to carry
  • 4 pieces of AA(LR6) battery operation - Easy battery exchange on site
  • Drip proof construction
  • Built-in deta memory
  • Compact Flash Card can be used
  • Built-in interval timer
  • Control and data transmission by RS-232C interface
  • Automatic measurement with sleep interval function
  • Use of external DC power supply available

  • Specifications
    Type TC-35N
    Maximum number of connection Conventional module 5 modules (when using internal AA batteries or AC adaptor)
    100 modules (when using external DC power source; 200m or less for 2-wire conection)
    Low-comsumption module 50 modules (when using internal AA batteries or AC adaptor)
    100 modules *1 (when using external DC power source; 2km or less for 2-wire connection)
    Maximum extension distance Conventional module 50m (when using internal AA batteries or AC adaptor)
    2km (when using external DC power source; 15 modules or less for 2-wire connection)
    Low-comsumption module 50m (when using internal AA batteries or AC adaptor)
    2km (when using external DC power source; 100 modules or less for 2-wire connection)
    Applicable transducer Conforms to network module
    Data acquisition speed Approx. 0.2sec/ch in scanning measurement
    Function

    Scanning measurement, Monitoring measurement, Module checking function, ID checking function, Reading transducer information (CAP, RO),
    Setting channel of network module
    Dimensions 102(W) x 55(H) x 223(D)mm
    Weight  Approx. 850g
    Power source Alkaline dry battery LR6×4 or Dedicated AC adaptor

    *1: When 2-channel modules (NSW-024C and NKB-MD) are used, the maximum number of channel is 100.
    Note: When conventional module and low-comsumption module are used together, the specifications follow those for conventional module.

System Block Diagram

tc35nsystem

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Gauge Protector

Gauge protector

This rubber protector is designed to protect gauges which are bonded onto metal surface from the environment for long-term measurement. The strain gauge is packed inside together with the applied adhesive and overcoating materials. The protector is also provided with a hole for cable intake. It allows the entire area to be isolated from ambient conditions which may affect reliable measurement, and further increases the coating performance.

Gauge Protector
gauge_protector

 

After completing the 1st and 2nd overcoating layers, epoxy resin is injected to provide mechanical protection.

 

Dimensions (mm)

Frame Φ100 (InnerΦ92) x 15 (Height)

Cover Φ100 x 3 (Thick)

Operational temperature range (℃)

 -20 to +80

Extension cable

 Φ9mm cable recommendable

Strain gauges with a large-size backing, such as the PFL-30-11 ane PL-60-11, cannot be used with the Gauge Protector.

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Strain Transducer

KM/KM-M Strain Transducer　
±5000×10-6 strainCE

The KM series strain transducers are designed to measure strain in materials such as concrete, synthetic resin which undergo a transition from a compliant state to a hardened state. Their extremely low modulus (KM-M:25N/mm2) ,(others:40N/mm2) and waterproof construction are ideally suited for internal strain measurement during the very early stages of curing. They are totally impervious to moisture absorption, producing excellent stability for long-term strain measurement. Relative temperature measurement is also possible with the KM-B. The built-in thermocouple sensor of the KM-BT enable actual temperature measurement in addition to strain measurement. Adding to the above embedment use, surface strain measurement onto concrete, H-beam steel is also available with various optional fittings.
The new KM-M type small-diameter strain transducer has a smaller diameter than the conventional product and is suitable for measuring concrete with a thin cover thickness and surface strain. The KM series is compliant to CE marking except for KM-50F and KM-M.

 

Protection ratings: 
IP67 equivalent for KM-30
IP68 equivalent for KM / KM-M

KM/KM-M Strain Transducer
Features
  • Self-temperature compensated transducer having a linear thermal expansion coefficient similar to concrete
  • Low elastic modulus enables inner strain measurement during the very early stages of curing
  • Simultaneous measurement of strain and temperature except for KM-30 ,KM-50F
  • Surface strain measurement is also available onto retaining wall, strut, sheet pile, etc.
  • KM-30/KM-100B/-100HB/-100BT Only CE Marking Compliant

  • Specifications
    Type Capacity Rated output
    (Approx.)    		 Non-linearity Temperature range
    KM-30 ±5000 x 10-6 strain 2.5mV/V
    (5000 x 10-6 strain)    		 1%RO -20 to +60℃
    KM-50F 4.0mV/V
    (8000 x 10-6 strain)    		 -20 to +80℃
    KM-100B 2.5mV/V
    (5000 x 10-6 strain)
    KM-100HB -20 to +180℃
    KM-100BT -20 to +80℃
    KM-50M ±5000 x 10-6 strain 3mV/V
    (6000 x 10-6 strain)    		 2％RO -20 to +80℃
    KM-100M 2.5mV/V
    (5000 x 10-6 strain)
    KM-100HM -20 to +180℃
    KM-100MT -20 to +80℃

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