Product introduction: 1:DSHD-2801F Low Temperature Penetrometer is designed and developed as per the ... and Bituminous Mixture for Highway Engineering. 2:DSHD-2801F Low Temperature Penetrometer is applied to determine needle penetration of petroleum asphalt ... food, highway construction, and other industries. Technical parameters: 1. Constant temperature bath (1) Power supply: AC220V±10%, 50 Hz; (2 ...