Differential pressure, pressure transmitter

The JINGXIN series capacitive transmitters are products manufactured by our company based on advanced domestic and international technologies. They feature innovative design principles, a complete range of varieties and specifications, simple installation and use, and intrinsic safety explosion-proof characteristics. They are particularly renowned for their high accuracy, compact size, lightweight, robust vibration resistance, convenient adjustment, long-term stability, and excellent unidirectional overload protection.
The JINGXIN series capacitive transmitters include pressure, differential pressure, absolute pressure, flow, level, and other varieties, along with their accessories. The signal formats and installation methods are fully consistent with products from other companies worldwide and comply with the "IEC" standard requirements promoted in China. With a clear price advantage, they are your ideal choice.

Structural Principle
The medium pressure is transmitted through the isolation diaphragm and silicone oil to the measuring diaphragm located at the center of the d-chamber. The measuring diaphragm acts as an elastic element, bending according to the differential pressure on both sides. The displacement of the measuring diaphragm is proportional to the differential pressure, with a maximum displacement of 0.1 mm. This is detected by capacitor plates on both sides. The differential capacitance between the measuring diaphragm and the capacitor plates is then converted into a two-wire 4–20 mA DC output signal via electronic circuitry.

Technical Parameters
● Measuring range: 0–40,000 kPa
● Output: 4–20 mA DC
● Power supply: 24 V DC (max. 45 V DC)
● Positive and negative migration: Regardless of the output, after positive or negative migration, the upper and lower limits of the range must not exceed the extreme limits of the range.
● Maximum positive migration: 500% of the minimum calibrated range
● Maximum negative migration: 600% of the minimum calibrated range
● Relative humidity: 0–100%
● Sensor volume change: less than 0.16 cm³
● Installation in hazardous areas: Explosion-proof type dIIBT5
● Intrinsic safety type ia II CT5
● Range and zero: Externally continuously adjustable
● Damping: Time constant continuously adjustable between 0.2–1.67 seconds
● Start-up time: 2 seconds, no warm-up required
● Stability: ±0.25% of the maximum range
● Weight: 2.9 kg (excluding accessories)

Installation and Use
● Pressure connection: Flange 1/4 NPT (pipe thread)
● Fitting thread: 1/2 NPT (tapered pipe thread)
● Electrical connection: Conduit 1/2 NPT wiring hole
● The transmitter's range is calibrated according to user requirements before leaving the factory. Users only need to fix the transmitter in place using the connectors to use it.
● If any issues arise, non-professionals should not attempt disassembly. Please contact our company immediately.

Product Features
● High accuracy
● Range and zero externally continuously adjustable
● Excellent stability
● Positive migration up to 600%, negative migration up to 600%
● Two-wire system
● Adjustable damping, overpressure resistance
● Solid sensor design
● No mechanical moving parts, minimal maintenance required
● Lightweight (2.9 kg)
● Unified structure across the entire series, strong interchangeability
● Compact size (total height 169 mm)
● Optional diaphragm materials for contact with the medium
● Strong unilateral overpressure resistance
● Low-pressure cast aluminum alloy housing, suitable for all-weather use

Ordering Information
● When ordering, specify the factory-calibrated range. If not specified, the maximum rated range will be used.
● Specify the installation method and the type of mounting bracket.