Submersible Load Cell for use in Triaxial Chambers | IP68 to 70bar | STALC3

At a Glance

Description

Applied Measurements STALC3 submersible load cell is designed for use in fully submerged in water, at pressures up to 7000kPa.  Primarily they are used in triaxial chambers and can be retrofitted into existing triaxial chambers or installed into new ones.  Triaxial chambers are pressurised chambers used for testing the shear strength of core samples taken from the earth.  These provide a direct measurement of the axial compression load applied to the sample under test.  Read more about triaxial chambers on our triaxial testing page.

In addition, our STALC3 submersible load cell can be adapted for use in other applications where they will be submerged in fluids including water and oil.

Thanks to its pressure compensating system, incorporated within its design, there is no change in zero or sensitivity when the STALC3 load cell is subjected to external pressure changes.  Plus, the STALC3 also features accurate temperature compensation, excellent accuracy and stability, which is essential for the type of long term testing applications in which they are used.

The standard 75mm diameter STALC3 submersible load cell is available in ranges from 0-1kN to 0-100kN.  The STALC3 can also be used to measure tension if required; for rated capacities up to 5kN tension loads up to the cell’s rated capacity can be applied.  For higher capacities of 10kN and upwards, tension rating is limited to 5kN as standard, however if you need to measure higher tensile forces we can manufacture customised versions on request.

Technical Specifications

Rated Capacity (RC)	kN	0-1, 0-3, 0-5, 0-10, 0-25, 0-50, 0-100
Operating Modes		Tension / Compression / Tension & Compression*
Sensitivity (RO)	mV/V	2.0 nominal (1.4 nominal on 1kN)
Zero Balance/Offset	±%/Rated Output	<5
Output Symmetry (tension vs. compression)	±%/Rated Output	<0.5 typical
Non-Linearity	±%/Rated Output (BFSL)	<0.05
Hysteresis	±%/Full Scale	<0.10
Repeatability	±%/Rated Output	<0.05
Temperature Effect on Zero	±%/Full Scale Output/ ˚C	<0.02
Temperature Effect on Sensitivity	±%/Full Scale Output/ ˚C	<0.01
Input Resistance	Ohms	750 nominal
Output Resistance	Ohms	700 nominal
Insulation Resistance	Megohms	>2000 (bridge to ground) & >1000 (shield to ground) @ 50Vdc
Excitation Voltage	Volts AC or DC	10 recommended (2-15 acceptable)
Operating Temperature Range	˚C	+5 to +50
Compensated Temperature Range	˚C	+10 to +50
Storage Temperature Range	˚C	-10 to +70
Safe Overload	% of Rated Capacity	150
Ultimate Overload	% of Rated Capacity	300
Deflection @ Rated Capacity	mm	<0.05
IP Rating (Environmental Protection)		IP68 to 7000kPa/70bar
Weight (excluding cable)	kg	0.85
Fatigue Life		108 cycles typical (109 cycles on fatigue-rated version)
Cable Length (as standard)	metre	3
Cable Type		4 core screened, PUR sheath, Ø4.6
Construction/Wetted Parts		Stainless Steel and Nitrile (NBR)
Resolution		1 part in 250,000 (with appropriate instrumentation)
Pressure Effect	%/Rated Output/100kPa	<0.005 typical
*Note: Load cells with a capacity of 1, 3 & 5kN can also be used in tension to their rated capacity. Where rated capacity is 10kN or higher, the maximum allowable tension load is 5kN.

Product Dimensions (in mm)

Wiring Details

Wire	Designation
Red	+ve excitation
Blue	-ve excitation
Green	+ve signal (compression)
Yellow	-ve signal
Screen	To ground – not connected to load cell body

Ordering Codes & Options

Core Product	Capacity (inc Engineering Units)	Cable Length (m)	Specials Code	Example Result
STALC3	1kN	003	000	STALC3-1kN-003-000
STALC3	3kN	003	000	STALC3-3kN-003-000
STALC3	5kN	003	000	STALC3-5kN-003-000
STALC3	10kN	003	000	STALC3-10kN-003-000
STALC3	25kN	003	000	STALC3-25kN-003-000
STALC3	50kN	003	000	STALC3-50kN-003-000
STALC3	100kN	003	000	STALC3-100kN-003-000