เครื่องวัดมุมองศาของเชือกที่ใช้ลากเก็บแพลงก์ตอน Clinometer

An excellent value-for-moneyproduct for use by pupils from KS2 through to ‘A’ Level. This robust,all-plastic instrument is a clever combination of a sighting device and aplumb-bob in an easy-to-use construction. The user simply sights along the topof the instrument to the top of a building or, more usually, a mark on aranging pole. The trigger is pulled, the weighted disc rotates under gravityand the trigger is released to lock the disc, allowing the slope angle to beread.