

The mechanical PREMASREG® DS 1 differential pressure switch/monitor with metal bracket serves to monitor above-atmospheric, differential and below-atmospheric pressure of clean air as well as gaseous, non-aggressive media in air ducts, air intake or exhaust devices. It is used as a flow monitor, differential pressure governor, pressure controller for flow monitoring at electric heating registers or for monitoring V-belts and filters. Further applications are found in air pressure deficiency protection, fan or air damper monitoring and limit value control. The switchpoint can be adjusted by means of an internal precision scale.
Mounting
with mounting ring
Max. pressure
5000 Pa (50 mbar)
Pressure range
high adjustment accuracy due to individual laser-etched scale
for each switch
Pressure range (adjustable)
100…1000 Pa (1.0...10.0 mbar)
Switching capacity (Contact load)
5 (0.8) A, 250 V AC
4 (0.7) A, 30 V DC
Contact
single-pole potential-free changeover contact,
multi-layer contact, gold-plated (DDC compatible)
Media temperature
–30 ...+85 °C
Operating Difference approx.
0.4 mbar ± 15 %
Pressure connection
P1 (+) for higher pressure
P2 (–) for lower pressure
Ø 6.2 mm (nipples)
Measuring range pressure
100...1000Pa
Electrical connection
0.14 - 1.5 mm2,
via terminal screws on circuit board
Housing
base: material PC (10 % GF),
colour light grey (similar to RAL 7035),
snap-on lid: material PC, transparent,
cable gland PG 11 with strain relief
Membrane
silicone, LSR (Liquid Silicon Rubber,
tempered at +200 °C, non-outgassing, LABS-free,
no emission of varnish-adhesion inhibiting substances),
long-term stability of switching points
due to trapezoidal bead membranes
Humidity
< 90 % r. H., non-precipitating air
Mounting
by 4-hole base ring, plastic
(included in the scope of delivery),
recommended mounting position:
vertical (pressure connections downward) – factory setting,
horizontal (cap up/ down)
Protection class
II (according to EN 60 730)
Protection type
IP 54 with top cover