High Precision Differential Pressure Transmitter Power-Off
Protection Function
Working Principle of Differential Pressure Transmitter
NY3051 series intelligent differential pressure / pressure
transmitter has a variable capacitance sensing component called“ σ”
Chamber (see the figure below), process pressure through“ σ”
Isolation diaphragms on both sides of the chamber and filling
liquid are transmitted to“ σ”, the central diaphragm of the
chamber. The central diaphragm is a tensioned elastic element,
which produces corresponding deformation displacement for the
pressure difference on both sides acting on it, and this
displacement is transformed into a differential capacitance formed
on the capacitor plate. The differential capacitance is converted
into a standard output signal by an electronic circuit.
Design feature of Differential Pressure Transmitter
◎High accuracy and good stability
◎with continuous self diagnosis, linear compensation and digital
fine-tuning functions;
◎local adjustment of zero position and range can be realized, and
remote adjustment can also be realized through remote manual
operator and computer;
◎linear or square root output can be selected according to
different applications;
◎the damping time can be set to change between 0.1 and 16S;
◎The pressure value unit can be converted between kPa, PA, inh2o,
bar, etc
◎The failure and safety modes can be set by toggling the failure /
safety switch
◎It has single point, multi-point and burst modes
◎it has power-off protection function, and can automatically save
its working data when power is off;
◎solid components, plug-in printed circuit boards, small, light,
strong and earthquake resistant;
◎good one-way overload protection
Technical parameters of Differential Pressure Transmitter
| Typical application | Liquid, gas, steam |
product model | NY3051 |
| measuring range | Upper limit URL |
| Code | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| URL(MPa) | 0.006 | 0.04 | 0.25 | 1.0 | 2.5 | 10 | 25 | 40 |
| Filling fluid | Silicone oil, inert oil(selectable) |
| Diaphragm material | 316L,Ha C alloy(can be customized) |
| Accuracy grade | 0.025,0.075,0.1,0.2 |
| Power Supply | 24VDC |
| Signal Output | 4...20mA/HART/RS485/Modbus... |
| Ambient Temperature | -40~+85℃ |
| Process Temperature | -25~+125℃(>125℃ can be customized) |
| Process connection | screw thread,flange(selectable) |
| Damping time | 0.1~16s adjustable |
| Field display | LCD (selectable) |
| levels of protection | IP67 |
| Explosion-proof grade | Exia II CT6 Ga,Exd II CT6 Gb(See certificate for details) |
※Note:The product can be customized according to the specific
requirements of users.
