A 3-dimensional printed load cell part can include a part body formed of fused thermoplastic polymer particles, and a plurality of strain sensors separately formed of a matrix of conductive particles interlocked with a matrix of fused thermoplastic polymer particles. The plurality of strain sensors can have a first electrical contact at a first end and a second electrical contact at a second end. The particles of the plurality of strain sensors can be continuously fused to the particles of the part body.