FN4070-FN4080
Seat Belt Buckle Sensor

SPECIFICATIONSOperating ranges from 0-1kN to 0-40kN
Crash-testing
Compatible with most seat belts
Detachable tongue and cable
Easy and economical maintenance
Lower operating ranges with model FN4080

The FN4070 load cell measures the effort
generated on the anchor point of seat belts during crashtests. It has been specifically designed with a replaceable
tongue. The load cell can be easily re-used by changing thetongue. It also has a cable output which can be renewed by
the crash test technicians to allow for cost-effective, inhouse maintenance of the device.
For other operating ranges (250-500-2500N) refer
to model FN4080. Consult your MEAS’ representative fortechnical specification.
With many years of experience as a designer andmanufacturer of sensors, Measurement Specialties, Inc.,
often works with customers to design or customize sensors
for specific uses and testing environments. To meet yourneeds we also offer complete turnkey systems. The
matched components (sensor, power, amplifier and digitaldisplay) are formatted, calibrated and ready for immediateuse.

FEATURES

Multiple tongues adjustable by customer
Dynamic application
Very robust for crash
Easy cable replacement for customer

APPLICATIONSCrash test on-board equipment
Security absorbers
Parachute belt and anchor testing

STANDARD RANGES
F.S. Ranges in N
F.S. Ranges in Lbf
Materials

1k200AluminumSENSOR SOLUTIONS /// FN4070_en

5k
1k

10k
2k

25k
5k

40k
9k

Stainless Steel

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Seat Belt Buckle Sensor

CHARACTERISTICS (typical values at temperature 23°C)
PARAMETERS
Operating Temperature Range (OTR)-20 to 80 °C [-4 to 176 °F]

Compensated Temperature Range (CTR)

0 to 60ºC [32 to 140°F]

Zero Shift in CTR<0.5% F.S. /50ºC [/100 F°]

Sensitivity Shift in CTR<1 % of reading /50 °C [/ 100°F]

Range (F.S.)

1 to 50 kN [200 Lbf to 10 kLbf]

Over-Range
Without Damage

1 to 25kN: 1.5 x F.S.

Without Destruction

3 x F.S.

40kN: 1.25 x F.S.

Accuracy
Combined Non-Linearity & Hysteresis<±0.5% F.S

Electrical Characteristics

Model
Supply Outage
F.S. Output
Zero Offset
Insulation under 50Vdc

FN4070
10Vdc
1 to 25kN: 20mV<±1 mV≥100MΩ

40kN: 16mV

Notes
1. Shielded Ø3 cable with 4 wires (AWG36/28), standard length 2 m [6.5 ft]
2. Material: Body in stainless steel or aluminium alloy depending on F.S.
3. Protection Index IP50 (other levels available on request)
4. CE conformance according to EN 61010-1, EN 50081-1, EN 50082-1

SENSOR SOLUTIONS /// FN4070_en

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Seat Belt Buckle Sensor

DIMENSIONS & WIRING SCHEMATIC (IN METRIC AND IMPERIAL)
Wiring Schematic

Dimensions in mm [inch]
Full Scale Range in N
[in Lbf]
AB
CDEFGHIJ

1k[200]36 [1.42]
24 [0.94]
12 [0.47]
6.2 [0.24]
3 [0.12]
13 [0.51]
30.5 [1.20]
7 [0.28]
24 [0.94]
5.2 [0.20]

SENSOR SOLUTIONS /// FN4070_en

5k[1k]
50 [1.97]
28 [1.10]
15 [0.59]
8.2 [0.32]
6 [0.24]
15 [0.59]
39.5 [1.56]
8 [0.31]30 [1.18]
8.2 [0.32]

05/201810k[2k]
50 [1.97]
28 [1.10]
15 [0.59]
8.2 [0.32]
6 [0.24]
15 [0.59]
39.5 [1.56]
8.2 [0.31]
30 [1.18]
8.2 [0.32]

25k
[5k]
61 [2.40]
37 [1.46]
19 [0.75]
12.2 [0.48]
8 [0.31]
24 [0.94]
50.5 [1.99]
12 [0.47]
30 [1.18]
8.2 [0.32]

40k
[10k]
92 [3.62]
55 [2.17]
29 [1.14]
18.5 [0.73]
12 [0.47]
37 [1.46]
75.5 [2.97]
18.5 [0.73]
40 [1.57]
12.2 [0.48]

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Seat Belt Buckle Sensor

OPTIONS
L00M: Additional cable length option, replace “00” with total length in meters

ORDERING INFORMATION

FN4070-10KN-/L5M
Options (L00M, ..)Range in Newton
ModelTE.com/sensorsolutions
Measurement Specialties, Inc., a TE Connectivity company.
Measurement Specialties, TE Connectivity, TE Connectivity (logo) and EVERY CONNECTION COUNTS are trademarks. All other logos, products and/or company names referred to herein
might be trademarks of their respective owners.
The information given herein, including drawings, illustrations and schematics which are intended for illustration purposes only, is believed to be reliable. However, TE Connectivity makes
no warranties as to its accuracy or completeness and disclaims any liability in connection with its use. TE Connectivity‘s obligations shall only be as set forth in TE Connectivity‘s Standard
Terms and Conditions of Sale for this product and in no case will TE Connectivity be liable for any incidental, indirect or consequential damages arising out of the sale, resale, use or misuseof the product. Users of TE Connectivity products should make their own evaluation to determine the suitability of each such product for the specific application.
© 2015

TE Connectivity Ltd. family of companies

SENSOR SOLUTIONS /// FN4070_en

All Rights Reserved.

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