Differential Pressure Manometer DIR 100/160 Series

 Hengesbach is a company from Deutschland. For more than 50 years Hengesbach develops, manufactures and distributes innovative measuring technology for applications in production processes where functionality, reliability and accuracy of the instruments are of highest priority even under extreme process conditions.

Differential Pressure Manometer DIR 100/160 Series

Differential pressure meters of the DIR type with two tube springs are used for simultaneously measuring two different pressures, with direct indication of the differential pressure ∆p. They consist of two tube spring systems that work independently of one another. Each system has its own pressure connection, labelled with + and -. Both types of pressure are transmitted to a double meter with concentric needle shafts. The pressure are indicated via a scale dial and an indicator.


  • round housing ng 100 and 160 mm for chemical use
  • differential pressure Δp can be directly read off


Housingbayonet housing 100 and 160 mm ∅ with bayonet ring seal made of material number 1.4301
 with pressure relief membrane *
 * Note: 
 a) Version with housing made of steel plate, black, with parts in contact with the medium
 made of Cu-Sn/MS.
 b) Version with housing made of steel plate, black, with parts in contact with the medium
 made of chromium/nickel/steel.
Pressure connectionEN 837-1, G ½ B made of stainless steel, material number 1.4571, consecutive, key width 22,
 labelling with + and -, seen from the dial, the plus connection is at the back
Measuring systemstainless steel measuring spring, material number 1.4571, welded into the connection cone
Indicatorsbrass / nickel silver 
Dialaluminium, white scale with black labels
Viewing panelaminated safety glass
Quality class EN 837-1class 1.6 of the maximum scale value
Environmental temperature- 40° C to + 60°C 
Medium temperature+ 60°C (soft solder), + 100°C (hard solder)
Capacity according to EN 837-1for static load:Maximum scale value
 for alternating load: 0.9 times the maximum scale value
Protection type EN 60529IP 65 = filled devices, G-addition
 IP 54 = unfilled devices

Download Data Sheet: Differential Pressure Manometer DIR 100_160 Series

Ref: Hengesbach.com