BSW Series
Solid state pressure switch with analog output
2/4
March 2001 / 016
www.sensortechnics.com
Specification notes:
1.
2.
3.
4.
5.
6.
7.
8.
Proof pressure is the maximum pressure which may be applied without causing damage to the sensing element.
The output signal of all BSW...D-PCB is proportional to the pressure applied to port P2, relative to port P1, e.g. the output signal
increases when vacuum is applied to port P1 relative to port P2.
The output signal of all BSW...A-PCB is proportional to the absolute pressure applied to port P1.
Span is the algebraic difference between the output at full scale pressure and offset.
Non-linearity refers to the Best Straight Line fit measured for offset, full scale and 1/2 full scale pressure.
Temperature shift tested and guaranteed at 70°C relative to 25°C. All specs are shown relative to 25°C.
Difference in output/switch point at any pressure within the operating pressure range and temperature within 0 - 70°C after:
a) 1000 temperature cycles, 0 - 70°C
b) 1 million pressure cycles 0 bar to full scale pressure
Hysteresis setting has a direct influence on the switching points
when the pressure increases or decreases.
The switching points can be calculated as follows:
Output going active (LED on)
when pressure exceeds SET POINT + hysteresis/2
Output going inactive (LED off)
when pressure falls below SET POINT - hysteresis/2
PERFORMANCE CHARACTERISTICS (unless otherwise noted V
S = 15 V, tamb = 25°C)
Characteristics
Operating pressure (differential/gage)2
BSWM070D...
BSWM350D...
BSW001D...
BSW002D...
BSW005D...
BSW010D...
Operating pressure (absolute)3
BSW001A...
BSW002A...
BSW005A...
Min.
0
0
0
0
0
0
0
0
0
Typ.
Max.
70
350
1
2
5
10
1
2
5
Unit
mbar
bar
ANALOG OUTPUT
0.8
4.8
1.0
5.0
4.0
0.2
±0.04
±0.03
±0.02
0.1
1.2
5.2
1.0
±0.20
±0.15
±0.10
V
%FSO
%FSO/°C
%FSO
Zero pressure offset
Full scale output
Full scale span4
Non-linearity and hysteresis (BSL)5
Thermal effects (0 - 70°C)6
Combined offset and span
BSWM070D...
BSWM350D...
all others
Long term stability7
SWITCHING OUTPUT
7
20
1
7.5
0.5
0.2
1.2
100
10
1
V
%
kHz
%FSO
Switching output 1
Switching output 2
Output voltage (high) Switching output 1
Output voltage (low) Switching output 2
Status indication
Threshold point setting8
Hysteresis setting8
Switching frequency
Switch point repeatability
pnp, open collector, load switched to ground
npn, open collector, load switched to +Vs
red LED
setpoint
1/2
hyst.
1/2
hyst.
pressure
switching
output
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