Thin film foil SG

The thin film foil SG is characterized by:

  • high sensitivity to deformation
  • flexible layouts in the arrangement of the measuring grid as well as in the design of the carrier material
  • energy saving
  • fast prototyping
  • and much more

And the development is not stopping. Whether it is an integrated temperature sensor or an alternative carrier substrate. Besides a portfolio of basic products, CeLaGo Sensors GmbH develops sensor elements for you which help you to fulfill today's sensor requirements from the prototype right up to the series product.

Depending on the requirements, a large diversity of SG is available. Learn more from our catalogue.

 

Description of the strain gauge article number

1 - X - SA -  MA -  XX -  GG.GG  -  RR.RR _ X
product group  

thin film material/

adjustment

  measuring grid arrangement   type   grid length    resistance   supplement (optional)

 

 

Thin film material (S)

The possible film characteristics at a glance:

Code (S) Thin film material Properties* Possible applications
W  NiCr
  • gauge factor=2
  • linear signal strain behaviour
  • adjustable temperature coefficient of the electrical resistance
  • design dependent resistance starting with 120 ohms
  • almost no transverse sensitivity
measurement transducers, weighing
S modified NiCr
  • k≈10
  • linear signal strain behaviour
  • adjustable temperature coefficient of the electrical resistance
  • design dependent resistance starting with 350 ohms
  • transverse sensitivity of the thin film up to 50%
  • compared to code U with improved stability and creep behaviour
  • creep compensation possible
measurement transducers
 U modified Ni
  • k=10...30
  • linear signal strain behaviour
  • adjustable temperature coefficient of the electrical resistance
  • design dependent resistance starting with 350 ohms
  • transverse sensitivity of the thin film up to 50%
dynamic measurements, short-term use
T Ni
  • temperature coefficient of the electrical resistance  >5000 ppm/K
  • to use as temperature sensor or for compensation
  • design dependent resistance starting with 10 ohms
measurement transducers

*the gauge factor can variate up to 1 dependent on design and compensation

 

Adjustment (A)

By compensating the apparent strain due to the thermal expansion of the transducer, the temperature sensitivity of the single resistor can already be decisively suppressed. Adjustments to the following coefficients of expansion of the transducer material are available:

Code (A) Adjustment to
A  0-4 ppm/K
B 4-8 ppm/K
C 8-10 ppm/K
D 10-14 ppm/K
E 14-18 ppm/K
F 18-24 ppm/K
S unadjust

Measuring grid arrangement (MA) and types (XX)

In addition to a number of standardized layouts, customer-specific designs can also be supplied. The classification of the measuring grid arrangements is according to the table:

Code (MA) Type of strain gage Overview of the types
LM linear pattern See the overview of linear pattern
SM shear pattern See the overview of shear pattern
TR T-rosette See the overview of T-rosette
PM half bridge See the overview of half bridge
VB full bridge See the overview of full bridge
MR membrane rosette

See the overview of membrane rosette

overview of linear pattern

Type LM01 LM02 LM03 LM06 LM07
Length of measuring grid [mm]  2,80 1,57 1,57 1,0 1,57

Width of SG [mm]

4,0 3,1 3,1 1,0 3,1

Length of SG [mm]

8,0 5,0 5,0 3,0 5,0

overview of shear pattern

Type SM01          
 		                            
Length of measuring grid [mm] 1,57        

Width of SG [mm]

2,5        

Length of SG [mm]

5,0        

overview of T-rosette

Type TR01          
 		                            
Length of measuring grid [mm] 0,8        

Width of SG [mm]

2,0        

Length of SG [mm]

8,4        

overview of half bridge

Type PM01          
 		                            
Length of measuring grid [mm] 1,15        

Width of SG [mm]

2,0        

Length of SG [mm]

10,0        

overview of full bridge

Type VB04 VB05 
 		 VB06      
 		                  
Length of measuring grid [mm] 2,0 2,0 2,0    

Width of SG [mm]

8,0  8,0 8,0    

Length of SG [mm]

8,0  8,0 8,0    

overview of membrane rosette

Type MR01          
 		                            
Outer diameter [mm] 20,0        

Diameter of the centers of inner grids [mm]

8,3        

Diameter of the centers of outer grids [mm]

16,0        

Radial grid width [mm]

2,0        

Grid arrangement (GG.GG) and resistance (RR.RR)

Code (GG.GG)
 		Grid length
 		Code (RR.RR) Resistance
00,80 0,8 mm 00.35 350 ohm
01,57 1,57 mm 01.00 1.000 ohm
02,80 2,8 mm 50.00 50k ohm
... ... ... ...

Supplement (X)

Kennung (X) Besonderheit
E samples
R right alignment (shear SG)
L left alignment (shear SG)
RL double-SG with right and left alignment (shear SG)
S customer-specific design
D double-SG
O uncovered
T thin substrate
K chain-SG

Our technical department will be glad to answer any of your questions. CeLaGo Sensors provides you SG for testing in your application field.