Riester Big Ben Wall Models

Generously dimensioned scale (Ø 147 mm (5.8 in) or 145 mm (5.7 in) and high-contrast scale layout for optimum readability.
Spacious basket on the reverse side for tubes and cuf
Spiral tube can be extended to 3m (118.1 in).
Non-wearing air-release valve with ine adjustment.
Specially hardened copper-beryllium membrane, resistant to aging, can withstand pressures of up to maximum 600 mm Hg
Micro-ilter to protect the release valve and measurement system
No zero-point ixation required
Maximum error tolerance: ± 3 mm Hg