Pressure switches for air DL
Type code
DL Pressure switch for air
1 Adjusting range 0.2–1 mbar (DL..E only)
1,5 Adjusting range -0.5–+1.5 mbar (DL..A only)
2 Adjusting range 0.2–2 mbar (DL..E, DL..EH only)
3 Adjusting range 0.2–3 mbar (DL..E, DL..A, DL..K only)
3,3 Adjusting range 0.2–3.3 mbar (DL..K only)
3,5 Adjusting range 0.3–3.5 mbar (DL..K only)
4 Adjusting range 0.5–4 mbar (DL..E, DL..EH only)
4,5 Adjusting range 0.3–5 mbar (DL..K only)
5 Adjusting range 0.4–5 mbar (DL..A, DL..K only)
5,1 Adjusting range 1.0–5.1 mbar (DL..K only)
8 Adjusting range 0.5–8 mbar (DL..K only)
10 Adjusting range 1.0–10 mbar (DL..E, DL..A, DL..K only)
11 Adjusting range 1.0–11 mbar (DL..K only)
14 Adjusting range 3–14 mbar (DL..E only)
16 Adjusting range 4–16 mbar (DL..K only)
24 Adjusting range 2–24 mbar (DL..K only)
30 Adjusting range 2.5–30 mbar (DL..A, DL..K only)
35 Adjusting range 12–35 mbar (DL..E only)
40 Adjusting range 5–40 mbar (DL..K only)
50 Adjusting range 2.5–50 mbar (DL..A, DL..K only)
150 Adjusting range 30–150 mbar (DL..A, DL..K only)
E With flat plugs, tube connection, adjusting screw, -15 – +85°C
EH With flat plugs, tube connection, adjusting screw, -40 – +110°C
A With screw terminals, Rp 1/4, tube connection, hand wheel, -15 – +80°C
K With tube connection, hand wheel, -15 – +80°C
H Locks off with rising pressure
N Locks off with falling pressure
G With gold contacts
-1 AMP plug connection (DL..E, DL..K only) (UR recognized)
-3 Electrical connection via screw terminals (DL..A, DL..K only) (UL listed)
-4 Electrical connection via screw terminals, IP 65 (DL..A, DL..K only)
-5 Electrical connection via 4-pin plug, without socket (DL 3/5/10/50/150A/K only)
-6 Electrical connection via 4-pin plug, with socket (DL 3/5/10/50/150A/K only)
-9 Electrical connection via 4-pin plug, with socket, IP 65 (DL 3/5/10/50/150A/K only)
K2 Red/green pilot LED for 24 V DC/AC (DL..A, DL..K only)
T Blue pilot lamp for 230 V AC (DL..A, DL..K only)
T2 Red/green pilot LED for 230 V AC (DL..A, DL..K only)
N Blue pilot lamp for 120 V AC (DL..A, DL..K only)
P With test tapping point (DL 5-150E, DL..K only)
1 With 1 test key (DL 5-150A only)
2 With 2 test keys (DL 5-150A only)
A External adjustment (DL 3/5/10/50/150A/K only)
W Z-angle bracket
Diaphragm pressure switches with micro switch for monitoring air and flue gas pressures on industrial and commercial installations and heating systems, for positive pressure,
negative pressure and differential pressure, enclosure: DL..A, DL..K: IP 54 (IP 65), DL..E:
IP 00/21/42/44, depending on the installation (cf. Accessories), EU certified.
The pressure switches marked with an * in the following table are silicone-free. They are
special-design pressure switches as defined by VdTüV Code of Practice “Druck 100/1”
(Pressure 100/1) and are suitable for applications in firing installations for steam and hotwater generators in accordance with TRD 604, Para. 3.6.4.
Type Connection Adjustment El. connection pu max.
[mbar]
DL 2E; 4E; 14E; 35E tube screw flat plugs 50
DL 2EH; 4EH tube screw flat plugs 15
DL 1E; 3E tube screw flat plugs 50*