
Vibrating Wire Strain Gauges for Bridge, Tunnel & Dam Monitoring: Complete Selection Guide
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Tension Load Cells: Built for Field Reliability
When a tieback anchor or rock bolt needs testing, the hardware you attach matters more than the brochure. Kingmach’s tension load cells stay linear through temperature swings and rough handling, so you get readings that mirror what’s happening underground. These cells come in standard ranges up to 3000 kN, with center-hole designs that slide onto most threadbar sizes. Custom ranges and cable lengths are routine. If your site calls for IP68-rated seals or submersible connectors, we build that into the cell before it leaves the factory.
Technical Detail
Kingmach sits in the middle of the geotechnical supply chain—not the cheapest, not the premium brand, but the one that ships quickly with specs you can trust. Tension load cells here are strain-gauge based, using heat-treated alloy steel elements with nickel-plated surfaces to resist surface corrosion. Output options include 4–20 mA, mV/V, or RS485, which simplifies hooking up to your existing datalogger. Because we manufacture in-house, you can request special modifications: a smaller outside diameter for tight drill holes, a higher safe overload rating, or dual bridges for redundancy on critical monitoring jobs. Our calibration reports come traceable to national standards, and each cell is shipped with a quick-start wiring guide. For structural health monitoring, pile load testing, or anchor proof testing, these cells give you direct tensile force data without having to interpret hydraulic pressure conversions.
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Products

Smart Formwork Axial Force Meter(VW)JMZX-39XXHAT
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Earth Pressure Cell ( VW & Smart Type) JMZX-50XXAT/ ATM
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Smart Vibrating Wire PiezometerSmart Piezometers (VW) JMZX-55XXHAT
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Most standard cells leave our factory with a combined error band of ±0.25% to ±0.5% of full scale, depending on range. That includes nonlinearity, hysteresis, and repeatability. Custom cells can be tuned tighter if your application needs it.
Our submersible versions come with welded stainless steel housings and double-sealed cable exits rated to IP68. We can supply up to 500 meters of vented cable, but you’ll need to specify the depth and waterproofing requirements before ordering.
Yes, center-hole models are our most common configuration for anchor testing. Standard bore diameters range from 25 mm to 130 mm, matching typical threadbars and DYWIDAG bar sizes. If your bar is an odd size, we can machine the center hole to your measurement.
Each cell is delivered with its own calibration sheet. If you have a calibrated proving ring or loading frame, you can check it on site. For formal recalibration, we recommend sending it back to us or a local accredited lab every 12–18 months, depending on use.
Most contractors go with the 4–20 mA output because it’s simple to troubleshoot over long cable runs. We also offer mV/V for direct strain readings if your datalogger has a bridge input, and RS485 for digital setups. We can advise on which one works best with your specific logger model.
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Mail: [email protected]
Contact Us: +8613808434127
Address: No. 188 Tongzipo West Rd, Changsha, Hunan, China