变片为两个应变片受到拉伸，两个应变片受到压缩。在作用在测量方向上的负荷的影响下，弹性体和随之变化的摩擦锁定应变片会发生弹性变形。这样便产生一个与负荷呈比例的测量信号电压。以下产品均为***销售：西门子称重模块7MH系列1、SIWAREXMS模块7MH4930-0AA012、SIWAREXCS模块7MH4910-0AA013、SIWAREXU单通道模块7MH4950-1AA014、SIWAREXU双通道模块7MH4950-2AA015、SIWAREXFTA模块7MH4900-2AA016、SIWAREXFTC模块7MH4900-3AA01西门子称重传感器WL系列SIWAREXWL230BB-SSA7MH5106-2PD00SIWAREXWL230BB-SSA7MH5106-3AD00SIWAREXWL230BB-SSA7MH5106-3LD00SIWAREXWL230BB-SSA7MH5106-3PD00SIWAREXWL230SB-SSA7MH5107-4AD00SIWAREXWL230SB-SSA7MH5107-4GD00SIWAREXWL230SB-SSA7MH5107-4PD00SIWAREXWL270CP-SSA7MH5108-5AD00)