Huba 620/625 Relative pressure switch
Medium : Liquids and neutral gases
Pressure range : -4 ... -900 mbar / 2 ... 6000 mbar
Electrical connection : Screw terminals, flat connector 6.3 mm
Pressure connection :Inside thread M5, hose connector ± 6 mm, outside thread
Features
The pressure switches of Type 620/625 with 13 pressure range gradations are suitable for liquids and gases. Pressure connections are available in ABS, PA 66, brass, or aluminum, and the membranes in NBR-based, FPM, EPDM, or silicone. Very precise due to finely tuned measuring ranges and high long-term stability. Robust design and therefore particularly suitable for general equipment construction, process engineering, and food automation.
• High accuracy due to ideally designed pressure range gradations
• Switching differences adjustable
• High long-term stability with a reproducibility of switching points < ±0.3 mbar
• Customer-specific switching points adjustable at the factory
• Rugged industrial switch with good price/performance ratio
• Best price/performance ratio
Specification
| Pressure range | |
| Relative | 2 ... 6000 mbar |
| Negative | -4 ... -900 mbar |
| Operating conditions | |
| Medium | Liquids and neutral gases |
| Medium temperature | NBR 0 ... +80°C FPM -10 ... +80°C EPDM -10 ... +80°C Silicone -40 ... +80°C |
| Ambient temperature | +65°C |
| Storage temperature | -40 ... +80°C |
| Lowest turn-on pressure | 2 mbar |
| Lowest switching difference | 1 mbar |
| Materials | |
| Case | Fibreglass reinforced plastic |
| Base type 620 | ABS or PA |
| Base type 625 | Aluminium / Nickel plated brass |
| Diaphragm | NBR / EPDM / FPM / Silicone |
| Other components | X 5 CrNi 18-10 (1.4301); Polyacetate (negative) |
| Electrical overview | |
| Nominal voltage | 250 VAC |
| Nominal current (resistive) | 1 A / 6 A |
| Nominal current (motor) | 0.5 A / 3 A |
| Contact system | Changeover contact |
| Mechanical life | 10⁶ switching cycles |
| Protection | |
| Without cover | IP00 |
| With cover | IP54 |
| Repeatability | |
| NBR / Silicone | ±5% of switching point (min ±0.3 mbar) |
| FPM / EPDM | ±10% of switching point (min ±0.6 mbar) |
| Electrical connections | |
| Screw terminals | Option |
| Tab connectors | AMP 6.3 mm |
| Cable gland | PG11 with cover |
| Pressure connections | |
| Type 620 | M5 / M12x1 / Ø6 mm |
| Type 625 | M12x1 / G⅛ / G¼ |
| Weight | |
| Type 620 | ~ 70 g |
| Type 625 aluminium | ~ 100 g |
| Type 625 brass | ~ 200 g |