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Tedea-Huntleigh
www.vpgtransducers.com
1
Model 121
Technical contact in Americas: lc.usa@vishaypg.com;
Europe: lc.eur@vishaypg.com; Asia: lc.asia@vishaypg.com
Document No.: 12076
Revision: 17-Feb-2014
High Capacity Compression Load Cell
FEATURES
•	Capacities: 10T–50T
•	Stainless steel housing
•	Surge arrestors fitted
•	Simple to install
•	0.03% total error
•	6-wire sense circuit
•	Output tolerance 0.1%
•	Optional
❍❍ EEx ia IIC T4—hazardous area approval
❍❍ Anti-rotation groove
APPLICATIONS
•	Truck weighbridges
•	Silo and hopper weighing
•	Train “rail” scales
•	Process weighing
DESCRIPTION
Model 121 is a high capacity truck scale and silo load cell
which is supplied complete with its own unique rocker
mounting components.
Suitable for all heavy duty weighing applications the 121
gives the user high accuracy and low installation cost.
The 121 has a stainless steel housing to protect against
corrosion. The alloy steel compression element is nickel
plated, and the rocker mounting accessories are zinc
plated alloy steel.
The two additional sense wires feed back the voltage
reaching the load cell. Complete compensation of change
in lead resistance due to temperature change and/or
cable extension, is achieved by feeding this voltage into
the appropriate electronics.
OUTLINE DIMENSIONS in millimeters
MODEL 121
A A
120
70
30
138.25
11
25
R130
R130
VIEW A-A
5-30ton
10-30 ton
50 ton
70
170.5
138.5
R35
120.3
79
15
25
A A
MODEL 121
R150
VIEW A-A
50 ton
High Capacity Compression Load Cell
Tedea-Huntleigh
www.vpgtransducers.com
2
Model 121
Technical contact in Americas: lc.usa@vishaypg.com;
Europe: lc.eur@vishaypg.com; Asia: lc.asia@vishaypg.com
Document No.: 12076
Revision: 17-Feb-2014
High Capacity Compression Load Cell
SPECIFICATIONS
PARAMETER VALUE UNIT
Rated capacity—R.C. (Emax) 10, 20, 30, 50 ton
NTEP/OIML Accuracy class Non-Approved
Maximum no. of intervals (n) 1000 3000
Y = Emax /Vmin 2000 6000
Rated output—R.O. 1.5 ±mV/V
Rated output tolerance 0.0015 ±mV/V
Zero balance 0.015 ±mV/V
Zero return, 30 min. 0.0500 0.0300 ±% of applied load
Total error (per OIML R60) 0.0500 0.0300 ±% of rated output
Temperature effect on zero 0.0300 ±% of rated output/°C
Temperature range, compensated –10 to +40 °C
Temperature range, safe –30 to +70 °C
Maximum safe central overload 150 % of R.C.
Ultimate central overload 200 % of R.C.
Excitation, recommended 10 VDC or VAC RMS
Excitation, maximum 24 VDC or VAC RMS
Input impedance 670±15 Ω
Output impedance 605±5 Ω
Insulation resistance >2000 MΩ
Cable length 15 m
Cable type 6 conductors, 26 AWG, Floating Screen, PVC jacket Standard
Construction Stainless steel housing, plated alloy steel element
Environmental protection IP68
All specifications subject to change without notice.
Vishay Precision Group
Document No.: 63999
Revision: 27-Apr-2011
www.vishaypg.com
1
Legal Disclaimer Notice
Disclaimer
Legal Disclaimer Notice
Disclaimer
Document No.: 63999
Revision: 27-Apr-2011
ALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE.
Vishay Precision Group, Inc., its affiliates, agents, and employees, and all persons acting on its or their
behalf (collectively, “Vishay Precision Group”), disclaim any and all liability for any errors, inaccuracies or
incompleteness contained herein or in any other disclosure relating to any product.
The product specifications do not expand or otherwise modify Vishay Precision Group’s terms and
conditions of purchase, including but not limited to, the warranty expressed therein.
Vishay Precision Group makes no warranty, representation or guarantee other than as set forth in the terms
and conditions of purchase. To the maximum extent permitted by applicable law, Vishay Precision
Group disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and
all liability, including without limitation special, consequential or incidental damages, and (iii) any and
all implied warranties, including warranties of fitness for particular purpose, non-infringement and
merchantability.
Information provided in datasheets and/or specifications may vary from actual results in different
applications and performance may vary over time. Statements regarding the suitability of products for
certain types of applications are based on Vishay Precision Group’s knowledge of typical requirements that
are often placed on Vishay Precision Group products. It is the customer’s responsibility to validate that a
particular product with the properties described in the product specification is suitable for use in a particular
application.
No license, express, implied, or otherwise, to any intellectual property rights is granted by this document, or
by any conduct of Vishay Precision Group.
The products shown herein are not designed for use in life-saving or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay Precision Group products not expressly
indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay
Precision Group for any damages arising or resulting from such use or sale. Please contact authorized
Vishay Precision Group personnel to obtain written terms and conditions regarding products designed for
such applications.
Product names and markings noted herein may be trademarks of their respective owners.

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121

  • 1. Tedea-Huntleigh www.vpgtransducers.com 1 Model 121 Technical contact in Americas: lc.usa@vishaypg.com; Europe: lc.eur@vishaypg.com; Asia: lc.asia@vishaypg.com Document No.: 12076 Revision: 17-Feb-2014 High Capacity Compression Load Cell FEATURES • Capacities: 10T–50T • Stainless steel housing • Surge arrestors fitted • Simple to install • 0.03% total error • 6-wire sense circuit • Output tolerance 0.1% • Optional ❍❍ EEx ia IIC T4—hazardous area approval ❍❍ Anti-rotation groove APPLICATIONS • Truck weighbridges • Silo and hopper weighing • Train “rail” scales • Process weighing DESCRIPTION Model 121 is a high capacity truck scale and silo load cell which is supplied complete with its own unique rocker mounting components. Suitable for all heavy duty weighing applications the 121 gives the user high accuracy and low installation cost. The 121 has a stainless steel housing to protect against corrosion. The alloy steel compression element is nickel plated, and the rocker mounting accessories are zinc plated alloy steel. The two additional sense wires feed back the voltage reaching the load cell. Complete compensation of change in lead resistance due to temperature change and/or cable extension, is achieved by feeding this voltage into the appropriate electronics. OUTLINE DIMENSIONS in millimeters MODEL 121 A A 120 70 30 138.25 11 25 R130 R130 VIEW A-A 5-30ton 10-30 ton 50 ton 70 170.5 138.5 R35 120.3 79 15 25 A A MODEL 121 R150 VIEW A-A 50 ton High Capacity Compression Load Cell
  • 2. Tedea-Huntleigh www.vpgtransducers.com 2 Model 121 Technical contact in Americas: lc.usa@vishaypg.com; Europe: lc.eur@vishaypg.com; Asia: lc.asia@vishaypg.com Document No.: 12076 Revision: 17-Feb-2014 High Capacity Compression Load Cell SPECIFICATIONS PARAMETER VALUE UNIT Rated capacity—R.C. (Emax) 10, 20, 30, 50 ton NTEP/OIML Accuracy class Non-Approved Maximum no. of intervals (n) 1000 3000 Y = Emax /Vmin 2000 6000 Rated output—R.O. 1.5 ±mV/V Rated output tolerance 0.0015 ±mV/V Zero balance 0.015 ±mV/V Zero return, 30 min. 0.0500 0.0300 ±% of applied load Total error (per OIML R60) 0.0500 0.0300 ±% of rated output Temperature effect on zero 0.0300 ±% of rated output/°C Temperature range, compensated –10 to +40 °C Temperature range, safe –30 to +70 °C Maximum safe central overload 150 % of R.C. Ultimate central overload 200 % of R.C. Excitation, recommended 10 VDC or VAC RMS Excitation, maximum 24 VDC or VAC RMS Input impedance 670±15 Ω Output impedance 605±5 Ω Insulation resistance >2000 MΩ Cable length 15 m Cable type 6 conductors, 26 AWG, Floating Screen, PVC jacket Standard Construction Stainless steel housing, plated alloy steel element Environmental protection IP68 All specifications subject to change without notice.
  • 3. Vishay Precision Group Document No.: 63999 Revision: 27-Apr-2011 www.vishaypg.com 1 Legal Disclaimer Notice Disclaimer Legal Disclaimer Notice Disclaimer Document No.: 63999 Revision: 27-Apr-2011 ALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE. Vishay Precision Group, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay Precision Group”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. The product specifications do not expand or otherwise modify Vishay Precision Group’s terms and conditions of purchase, including but not limited to, the warranty expressed therein. Vishay Precision Group makes no warranty, representation or guarantee other than as set forth in the terms and conditions of purchase. To the maximum extent permitted by applicable law, Vishay Precision Group disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special, consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular purpose, non-infringement and merchantability. Information provided in datasheets and/or specifications may vary from actual results in different applications and performance may vary over time. Statements regarding the suitability of products for certain types of applications are based on Vishay Precision Group’s knowledge of typical requirements that are often placed on Vishay Precision Group products. It is the customer’s responsibility to validate that a particular product with the properties described in the product specification is suitable for use in a particular application. No license, express, implied, or otherwise, to any intellectual property rights is granted by this document, or by any conduct of Vishay Precision Group. The products shown herein are not designed for use in life-saving or life-sustaining applications unless otherwise expressly indicated. Customers using or selling Vishay Precision Group products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay Precision Group for any damages arising or resulting from such use or sale. Please contact authorized Vishay Precision Group personnel to obtain written terms and conditions regarding products designed for such applications. Product names and markings noted herein may be trademarks of their respective owners.