Jiangong Tianjin Huayin Instrument Technology Co., Ltd. SJY1000 penetration concrete strength tester uses: Suitable for masonry mortar strength detection. Leveraged afterburner measured nail penetration mortar conversion mortar compressive strength of a new type of on-site detection methods by the penetration depth of the nail with the strength curve. Product Features: a simple, accurate test results, test cost advantages, praised by users, is currently the most widely used site mortar strength detection a detection technology. Technical parameters: Penetrometer penetration force: 1000 ± 10 working stroke: 20 ± 0.1mm digital measuring scale range: 40mm ± 0.01mm measured nail length: 40mm measured nail diameter: 3.5mm gauge slot: 39.5mm