Digital Pressure Switch
PT300 Smart Digital Pressure Switch is an intelligent digital display pressure measurement and control product integrating pressure measurement, display, and output control. The product is a fully electronic structure, which measures and controls the pressure of the control system. The intelligent pressure switch is flexible to use, simple to operate, easy to debug, safe and reliable. Widely used in hydropower, tap water, petroleum, chemical, machinery, hydraulic and other industries to measure, display and control the pressure of fluid media
Description
The PT300 intelligent pressure switch is an intelligent digital display pressure measurement and control product integrating pressure measurement, display, and output control. The product is a fully electronic structure, which measures and controls the pressure of the control system. The intelligent pressure switch is flexible to use, simple to operate, easy to debug, safe and reliable. Widely used in hydropower, tap water, petroleum, chemical, machinery, hydraulic and other industries to measure, display and control the pressure of fluid media
Technical Parameters
Parameter | Parameter Value | Parameter | Parameter Value |
Measuring Range | -0.1~0-0.02~100MPa | Measurement Accuracy | ≤±0.25%,0.5%FS |
Stability | ≤0.2% /year | Display Method | 4-digit digital tube unit display |
Type of pressure | Gauge pressure, absolute pressure, sealed gauge pressure | Display range | -1999~9999 |
Overload capacity | 1.5times full scale | Maximum power consumption | ≤1W |
Power supply | 15~36V.DC | PL | IP65 |
Switch load capacity | ＜1.2A(24V.DC) | Output form | 2 switch quantity(PNP/NPN)+4～20mA |
Load resistance | ≤(U-12)/0.02Ω | ||
Switch life | ＞10years | Response time | ≤5ms |
Medium temperature | -40℃~85℃ | Ambient temperature | -40℃~70℃ |
Relative temperature | 0~95% | Storage temperature | -20℃~60℃ |
Temperature effect | Within the specific working temperature,the output change≤±0.05％ of the range for every 10℃ change in the ambient temperature | ||
Dimensions & Attention
SELECTION GUIDE
| SeriesGuide | PT300 | – | X | – | X | X | – | X | – | X | – | X | – | X | ||
| Pressure Category | Gauge | G | ||||||||||||||
| Absolute Pressure | A | |||||||||||||||
| Pressure Category | bar | B | ||||||||||||||
| MPa | M | |||||||||||||||
| kPa | K | |||||||||||||||
| Pressure range | Pressure Range Value x | X | ||||||||||||||
| Process Connection | G1/4 | G1/4 | ||||||||||||||
| 1/4NPT | 1/4NPT | |||||||||||||||
| G1/2 | G1/2 | |||||||||||||||
| M20×1.5 | M20 | |||||||||||||||
| R1/4 | R1/4 | |||||||||||||||
| R1/2 | R1/2 | |||||||||||||||
| 1/2NPT | 1/2NPT | |||||||||||||||
| Output Signal | 1 channel PNP+4-20mA output | H1 | ||||||||||||||
| 2 channel PNP output | H2 | |||||||||||||||
| 2 channel PNP+4-20mA output | H3 | |||||||||||||||
| 1 channel NPN+4-20mA output | H4 | |||||||||||||||
| 2 channel NPN output | H5 | |||||||||||||||
| 2 channel NPN+4-20mA output | H6 | |||||||||||||||
| Accuracy Class | 0.5%FS | — | ||||||||||||||
| 0.25%FS | 2A | |||||||||||||||
| Special Requirement | Please consult for other special requirem | |||||||||||||||
PRECAUTIONS
1) When installing the connecting cable, the power supply 24VDC to the instrument should be separated from the electrical cable, and try to avoid parallel wiring at close distances.
2) Based on the anti-interference principle of digital circuit AD sampling, we solemnly remind users that the alarm speed of the switch is not as fast as possible. The choice of the alarm speed should be based on the need, in the balance between speed and stability. When the alarm speed is selected quickly, accidental fluctuations in the pressure signal or accidental interference burrs on the power supply may cause frequent alarms after being collected by the digital circuit. When the alarm speed is selected relatively slowly, the digital circuit can have sufficient time to correct The signal is subjected to interference removal filtering, and the stability can be greatly improved.
Operation & Maintenance
Operation:
1. The user can put into operation without any adjustment of the pressure switch. Beforethe operation, check whether the installation and electrical connection are correct, turn on the power, and put it into operation.
2. The pressure switch can work when the power is turned on, and the output signal is stable and reliable.
Maintenance:
The pressure switch is a high-precision measuring instrument. In daily maintenance, check whether the cable sheath is aging and cracked, and whether there is water ingress. If the pressure hole is blocked or the diaphragm is fouled, please clean it with a solvent compatible with the material of the pressure switch structure. Do not use a wire to poke the pressure hole or brush the diaphragm.
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