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The KM series strain transducers are designed to measure strain in materials such as concrete, synthetic resin which undergo a transition from a compliant state to a hardened state. Their extremely low modulus (40N/mm2 approx. except for KM-A) and waterproof construction are ideally suited for internal strain measurement during the very early stages of curing. They are totally impervious to moisture absorption, producing excellent stability for long-term strain measurement. Relative temperature measurement is also possible with the KM-A and KM-B. The builtin thermocouple sensor of the KM-AT/KM-BT enable actual temperature measurement in addition to strain measurement. Adding to the above embedment use, surface strain measurement onto concrete, H-beam steel is also available with various optional fittings. The KM series is compliant to CE marking except for KM-30 and KM-50F. Protection ratings: IP67 equivalent for KM-30 IP68 equivalent for KM-50F ~ KM-200AT