Differential
Pressure Switch
Series: 911.82
Description
Applications
Specifications
Description
BENEFITS
The 911.82 is a factory set differential pressure switch for monitoring overpressure, vacuum, or differential pressure in air and other non‑combustible, non‑aggressive gases.
With ranges from 20 Pa to 1,000 Pa and IP54/IP65 builds, 911.82 is ideal for filter monitoring, fan proving, duct airflow, damper/fire‑flap control and frost protection in HVAC.
Applications
Application Details
- Air filter monitoring (AHUs, CRAC units) — early clogging indication or alarm.
- Fan proving / airflow interlock — ensure airflow before enabling heaters or burners.
- Duct airflow supervision — simple limit switching for VAV/ventilation ducts.
- Damper & fire‑flap control — status feedback via adjustable setpoint.
- Industrial cooling‑air circuits & frost protection on heat exchangers.
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Why 911.82
- Factory set switching points
- Wide, overlapping ranges: 20…5,000 Pa variants cover most HVAC use‑cases.
- Compact & robust: PA 6.6 housing, transparent cover; IP54 standard, IP65 option.
- Electrical versatility: standard and low‑current contact options; AMP 6.3 mm quick‑connects.
- Approvals available: UL and ATEX type‑tested versions (series options)
Specifications
| Medium | Air and other non‑combustible, non‑aggressive gases (HVAC/air‑side applications). |
| Pressure Ranges |
factory set switching points |
| Operating temperature | –20…+85 °C |
| Housing / protection | Housing PA 6.6, transparent cover; IP54 (with cover) |
| Pressure connections | Two hose stubs, 6 mm OD — P1 (+) high pressure, P2 (–) low pressure. |
| Electrical data | Standard contact: max 1.0 A (0.4 A) / 250 VAC |
| Electrical connection | AMP 6.3 × 0.8 mm quick‑connects (DIN 46244); optional screw terminals/cable gland |
| Service life | ≥ 106 switching cycles (mechanical) |
| Options / approvals | UL variants ATEX type‑tested variants IP65 builds Duct kits Restrictors 0.3/0.5/0.8 mm Mounting brackets |
IP and Certification Options
911.82 can be provided in different certification options, including, but not limited to
- IP00
- IP54
- IP65
- ATEX (EX)
- UL
Cable Feedthrough Options
Options are
- cable conduit M20x1.5
- cable conduit NPT 1/2
- cap nut conduit AF20
Pressure Ranges
| Matrix | Pressure Ranges |
|---|---|
| 1 | 20 to 150 Pascal (0.2 to 1.5 mbar) |
| 2 | 150 to 700 Pascal (1.5 to 7.0 mbar) |
| 3 | 700 to 1000 Pascal (7.0 to 10.0 mbar) |
