Pressure Sensor
Series QTT
General Purpose Pressure Switches
QTT 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 can control the system without any controller due to the output of a 2-channel NPN open collector switch.
Feature
-Electrical pressure switch with no mechanical moving part
-Fast response 1ms
-Measuring range 0~400MPa
-Two pressure setting points
-Self temperature compensation foil strain gauge
-Stainless steel media - wetted material
Applications
-Process control
-Hydraulics & Pneumatic
-Compressor Control
-Chillers
-Refrigeration Equipment
SPECIFICATIONS
QTTI | QTTL | |||
Range | ||||
0~1，2，3，5，10，20，30，35，50，100，250，400MPa（Gauge） 0.1~0，1，2，3，5，10，20，30，35，50，100，250，400MPa（Gauge） | ||||
Performance | ||||
Accuracy | ±1%FS | |||
Hysteresis | 3%FS（Factory Setting） | |||
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 | （analog） | 1~3VDC | ||
（switch） | 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)3/8” | |||
Media - Wetted Materials | Stainless Steel 630 | |||
Weight | Approx. 180g（include cable lm） | |||
Wire Color | Connections | |
QTTI | QTTL | |
Red | Power o+ | Power o+ |
Black | Com.o- | Com.o- |
Green | Analog Output o+ | X |
Yellow | Switch 1 | Switch 1 |
White | Switch 2 | Switch 2 |
Shield | Earth | Earth |
Circuit Diagram
Ordering Information
* Specifications are subiect to change without notice
WZO CONTROLS LTD