Differential pressure relay 0,5-30mbar | 10A | 115-277VAC

Technical Specifications
General Features:

Medium: Airflow detection
Mounting position: Diaphragm can be mounted in any vertical plane
Switch type: SPDT (Single Pole Double Throw)
Maximum working pressure: 30 mbar
Pressure sensing range: 0.5 ± 0.05 mbar to 30.0 mbar
Switch differential pressure: Progressively increasing – from 0.05 mbar at the lowest setting to 2.0 mbar at the highest
Temperature Limits:

Operating temperature: -40°C to +82°C
Electrical Parameters:

Maximum load: 300 VA pilot load, 115–277V AC
Rated current: 10A, non-inductive, 277V AC
Electrical connections: Screw terminals with washers
Connections:

Connections: 0.25" OD tube compression fittings with ferrule and nut
Alternative: 0.25" male slip-on fitting

Selectable parameters according to the order code:
Order code: ESLF35- 1(A) 1(B) A(C) 1(D) - P0.5mbar (Pressure setting: P0.5mbar; P = positive pressure; V = vacuum)

A Working pressure:
1 = 0.5 mbar – 30 mbar
2 = 0.2 mbar – 5.0 mbar

B Connection:
1 = suitable for connecting a 0.25" OD rigid or semi-rigid external tube
2 = 0.25" male plug connection, suitable for flexible tubes

C Mounting:
A = bracket A
B = bracket B

D Wire protection:
0 = without protection
1 = with protection at the closure point 
Functions and Features:

Suitable for various HVAC and energy systems
Can detect positive, negative or differential pressure
Wide adjustment range
High temperature tolerance
Contact protection via cover
SPDT switch for flexible control circuit integration
Applications:

Monitoring fans and filter status in HVAC systems
Monitoring air ducts in ventilation systems
Measuring airflow in tunnels and industrial spaces
Measuring both positive and negative air pressure in industry
Pros:

Universal pressure detection
Wide adjustable sensitivity range
Robust metal housing
High temperature tolerance (-40°C to +82°C)
SPDT switch – flexible use
Protection against accidental electrical contact
Easy installation with 0.25" OD fittings
Cons:

Not suitable for liquid pressure
Not waterproof – must be installed in dry environments
Must be installed in a vertical position
Reliable and versatile differential pressure switch for efficient monitoring in HVAC and energy systems.