KJA-A/KJB-A Joint-Meter　Approx.1mV/V（2000×10^－6strain）

These models are used to measure joint opening displacement of mass concrete. Two models are ready for different applications. The KJA-A Joint-Meter is embedded in an exclusive socket mounted to concrete blocks made of mass concrete or other materials, and is used to measure joint opening displacement. The KJB-A is used to measure displacement on concrete surfaces or underwater simply by manufacturing appropriate fittings. Moreover, these models are available for waterproof type displacement transducer. Optional model with built-in thermocouple unit can be supplied.

Protection ratings : IP 68 equivalent

• Specificatioins

  Type	Capacity	Rated output (Approx.)	Non-linearity	Temperature range
  KJA-5A KJB-5A	5mm	1mV/V (2000 x 10-6 strain)	1%RO	-20 to +80℃
  KJA-10A KJB-10A	10mm
  KJA-20A KJB-20A	20mm
  KJA-50A KJB-50A	50mm

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

• 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.

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.

• 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

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.

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

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