Series QTP
General Purpose Pressure Switches
QTP sensing element has excellent temperature properties by adopting a self temperature compensation foil strain gauge.A diaphragm and a pressure port are composed as one body for the prevention of leakage.It is also durable to an instant over pressure.It can control the system without any controller due to the output of a 1 or 2 channel NPN open collector switch.
Feature
-Electrical pressure switch with no mechanical moving part
-Fast response 1ms
-Measuring range 0~50MPa
-One or two pressure setting points
-Self temperature compensation foil strain gauge
-Stainless steel media - wetted materials
Applications
-Process control
-Hydraulics & Pneumatic
-Compressor Control
-Chillers
-Refrigeration Equipment
SPECIFICATIONS
QTPU | QTPW | |||
Range | ||||
0~1,2,3,5,10,20,30,35,50MPa(Gauge) -0.1~0,1,2,3,5,10,20,30,35,50MPa(Gauge) | ||||
Performance | ||||
Accuracy | ±1%FS | |||
Hysteresis | Hysteresis adjustable(2~10%) | 3%FS | ||
Thermal Effect on Zero | ±0.1%FS/℃ | |||
Thermal Effect on Span | ±0.1%FS/℃ | |||
Compensated Temperature Range | -10~70℃ | |||
Operating Temperature Range | -20~80℃ | |||
Electrical | ||||
Excitation | 11~28VDC | |||
Output | 1 Channel NPN Open Collector | 2 Channel NPN Open Collector | ||
Switch Load Current | 28V 80mA Max. | |||
Electrical Connection | Cable | |||
Physical | ||||
Proof Pressure | 150%FS Max. | |||
Burst Pressure | 200%FS Min. | |||
Vibration | 49.1m/s2{5G},10~500Hz | |||
Shock | 490m/s2{50G} | |||
Pressure Port | R(PT)1/8”,G(PF)1/8”,R(PT)1/4”(Stock),G(PF)1/4”,R(PT)3/8”(Stock),G(PF)3/8” | |||
Media - Wetted Materials | Stainless Steel 304,630 | |||
Weight | Approx.150g(include cable 50cm) | |||
Dimension
Wire Color | Connections |
Red | Power ⊕ |
Black | Com.⊝ |
Green | Switch 1 |
White | Switch 2 |
Shield | Earth |
.
Wire Color | Connections |
Red | Power ⊕ |
White | Com. ⊝ |
Green | Switch |
Shield | Earth |
Circuit Diagram
Ordering Information
* Specifications are subiect to change without notice
WZO CONTROLS LTD