Bolt strain gauge series BTM/BTMC

These gauges are used for measurement of tensile strain of bolt. They are simply inserted into pre-drilled hole in the bolt with exclusive adhesives. This method is recommendable when an ordinary strain gauges can not be mounted on the bolt surface. Accurate tensile force measurement is possible by calibrating the bolt after installing the bolt gauges.

• Single-element

  Gauge lead: polyurethane wire ø0.14, 80 mm
  * The cover on the polyurethane wire can be peeled away with a soldering iron, allowing it to be worked later.

  
  

   

  Type	Gauge length (mm)	Gauge width (mm)	Backing length (mm)	Backing width (mm)	Resistance (Ω)
  BTM-1C (Φ1.6mm)	1	0.7	5.6	1.4	120
  BTM-6C (Φ2mm)	6	1.0	12.0	1.7
  BTM-6CTA Temperature-integrated（-10 to +80℃） (Φ2mm)	6	1.0	12.0	1.7

  Each package contains 10 gauges.

• We can embed a BTM (bolt strain gauge) into any bolt.

  The way of adhering a BTM (bolt strain gauge) differs from a general strain gauge, requiring drilling of the bolt, embedding the strain gauge, and load calibration.

  Ex.) Load calibration specifics (bolt size: M10 × 1.25, L = 65)

  Load (kN)	0.0	4.6	9.2	13.8	18.4	23.0	Nonlinearity (%RO)	Calibration coefficient (kN/1×10-6)
  Indicated strain (×10-6)	0	378	747	1129	1518	1916	1.1	0.0120

  [We also embed temperature-integrated BTM (bolt gauge). Contact us for details.]

• series BTMC

  Single-element (G.F. 2.1 approx.)

  

  Type	Gauge length (mm)	Gauge center a (mm)	Backing diameter b (mm)	Resistance (Ω)	Applicable hole diameter (mm)
  BTMC-05-D10-003LE	0.5	5	Φ0.9	120	Φ1.0
  BTMC-1-D16-003LE	1	5	Φ1.5	120	Φ1.6
  BTMC-3-D20-003LE	3	10	Φ1.9	120	Φ2.0

  Each package contains 10 gauges.

OU Ring type Displacement Transducer　
10mm to 30mm

The OU displacement transducer is a combination of a round plate spring and strain gauges. It is mounted with its contact tip pressed against a structure. When displacement occurs in the structure, the plate spring is deformed and an output proportional to the displacement can be output.

• Specifications

  Type	Capacity	Rated output	Sensitivity (x 10-6 strain/mm)	Non-linearity	Temperature range
  OU-10	10mm	Approx. 5mV/V (10000 x 10-6 strain)	Approx. 1000	1%RO	0 to +40℃
  OU-20	20mm		Approx. 500
  OU-30	30mm		approx. 300

  Output polarity

  

  Measurement moves in the minus direction when the contact tip is pushed inward.

Strain gauge Users' Guide
Strain Gauge Performance Characteristics

A wide range of TML strain gauges are available to match diverse measuring conditions. Since strain gauges provide their designed functions only when they are attached to specimens, it is important to select the most appropriate gauge type in consideration of the specimen material type, gauge type in consideration of the specimen material type, operating temperature, measurement environment and installation dimensions. The Strain Gauge Users' Guide provide inexperience users with comprehensive information on strain gauges, covering various subjects ranging from step-by-step strain gauge installation instructions to cautions in handling strain gauges. The Strain Gauge Performance Characteristics compile a guide to the technology of current strain gauge for use in consideration of a limit in detection with regard to the materials and size of a test specimen, humidity, the amount of strain, speed, fatigue, environments, etc..

LTB-NA Torque Transducer 10N･m to 1kN･m

The LTB-NA Torque Transducer is a flange-mounted transducer that is installed between non-rotating measuring items in order to detect torque in the items.

Protection ratings : IP 30 equivalent

• Specifications

  Type	Capacity	Rated output	Non-linearity	Temperature range
  LTB-10NA	10N･m	1mV/V (2000x10-6strain)±2%	0.3%RO	-10 to +60℃
  LTB-20NA	20N･m
  LTB-30NA	30N･m
  LTB-50NA	50N･m
  LTB-100NA	100N･m
  LTB-200NA	200N･m
  LTB-300NA	300N･m
  LTB-500NA	500N･m
  LTB-1KNA	1kN･m

SPOT WELDER W-50RC

This is a capacitive charge spot welder used for installing weldable strain gauges and fixing lead wires. The welding energy is controlled in 2 ranges of 1~10/5~50 watt second continuously, and a stabilizing circuit cancels the effect of changes in the power source voltage. Projecting parts such as electrical cables is packed inside, it is extremely convenient for field applications.

TF series Temperature gauge

• TEMPERATURE GAUGE

  Gauge pattern	Type	Gauge length (mm)	Gauge width (mm)	Backing length (mm)	Backing width (mm)	Resistance (Ω)	Sensitivity (Ω/℃)
  	TFL-2-60	2	1.9	6.1	3.5	60	0.34 approx.
  	TFL-3-60	3	3.2	8.5	5	60	0.34 approx.
  	TFL-6-60	6	2.6	12.4	4.5	60	0.34 approx.
  	TFL-8	8	3.5	14	5.5	120	0.68 approx.

  Leadwire-integral service is available on request.

• TGA-1A/TGA-1B Temperature Gauge Adaptor Optional

  This adaptor is provided with temperature gauge TF series for direct reading of temperature with optional strainmeter, and converts output to 100×10^-6 strain/℃.

  

  Type of Adaptor	Type	Temperature (℃)	Sensitivity (x10-6 strain/℃)	Accuracy (℃)	Bridge mode	Dimensions (W) x (H) x (D)	Weight (g)
  TGA-1A	TFL-2-60	-20 to +200	100	±1,or less	Full bridge	100 x 40 x 70	370
  	TFL-3-60
  	TFL-6-60
  TGA-1B	TFL-8