Of course. Here is a detailed overview of the XMAV12L2135 Pressure Sensor / Pressure Switch.
Based on the model number, this is a highly versatile device that combines the functions of a programmable pressure transmitter (sensor) and a programmable pressure switch into a single unit. This dual functionality makes it extremely efficient for control and monitoring applications.
The "XMA" prefix indicates it is a product from Chint (Xinmai).
XMAV12L2135 - Overview
The XMAV12L2135 is a digital, electronic pressure switch and sensor. Unlike traditional mechanical pressure switches that use springs and levers, this device uses a piezoresistive sensor and a microprocessor. This allows for:
High Accuracy: Precise pressure measurement and switching.
Programmability: Fully adjustable setpoints, hysteresis, and output signals via buttons or software.
Dual Functionality: It provides a continuous analog signal (e.g., 4-20mA or 0-10V) representing the pressure and up to two independent switch outputs (relays) that activate at user-defined setpoints.
It is designed for a wide range of industrial applications, including hydraulic and pneumatic systems, process control, water treatment, and HVAC.
Key Features
2-in-1 Device: Combines a precision pressure sensor/transmitter with a programmable switch, saving space and cost.
Digital Display: A clear LCD shows the measured pressure in real-time, as well as setpoints and configuration menus.
Programmable Switch Outputs: Typically features 2 independent SPDT relay outputs (often 8A, 250V AC). These can be set to activate for high pressure, low pressure, window mode (inside/outside a band), or alarm conditions.
Analog Output: Provides a standard analog signal (e.g., 4-20mA or 0-10V) proportional to the measured pressure, which can be sent to a PLC, DCS, PID controller, or data logger.
High Accuracy: Typically around ±0.5% Full Scale (FS) or better, far superior to mechanical switches.
Adjustable Hysteresis: The "dead band" for the switch points can be programmed to prevent relay chattering near the setpoint.
Robust Housing: Usually rated to IP65 or higher, making it suitable for harsh industrial environments.
Multiple Pressure Ranges: Available in many different pressure ranges (e.g., 0-10 bar, 0-100 bar, 0-400 bar, etc.). The "L2135" suffix likely specifies the pressure unit (e.g., bar), range, electrical connection, and process connection type.
Typical Technical Specifications
| Parameter | Specification | |
|---|---|---|
| Pressure Type | Typically Gauge Pressure (G) | Absolute (A) options likely available |
| Pressure Range | Varies (e.g., 0-10 bar, 0-100 bar, 0-400 bar). Check model suffix. | |
| Output Signal | Analog: 4-20mA / 0-10V (likely selectable) Digital: 2x Relay (Switch) Outputs | |
| Relay Rating | Typically 8A, 250V AC (SPDT - Changeover contacts) | |
| Power Supply | Typically 10...30V DC (standard for 4-20mA loops) or 12...24V AC/DC | |
| Accuracy | ±0.5% FS (Full Scale) or better | |
| Display | 4 or 6-digit LCD with backlight | |
| Process Connection | Stainless Steel (e.g., 316L). Common threads: G1/4", M20x1.5, NPT 1/4" | |
| Media | Compatible with liquids, gases, and air (stainless steel wetted parts) | |
| Housing Protection | IP65 (Dust jet and water resistant) | |
| Operating Temp. | -20°C ~ +70°C (or wider) |
Crucial: The exact specifications are defined by the full model number suffix. Always consult the official Chint (Xinmai) datasheet for your specific unit.
Function and Operation
The device performs two main jobs simultaneously:
As a Pressure Sensor/Transmitter:
The pressure media acts on the internal piezoresistive sensing element.
The microprocessor converts this signal into a precise digital value.
This value is shown on the LCD and is converted into a proportional analog output signal (e.g., 4-20mA).
As a Pressure Switch:
The user programs two setpoints (e.g., P1 and P2) and a hysteresis value for each.
The internal logic compares the measured pressure to these setpoints.
When the pressure crosses a setpoint (e.g., rises above P1_high), the corresponding relay changes state (e.g., de-energizes), switching the connected circuit (e.g., turning off a pump).
The relay will only return to its normal state when the pressure moves beyond the setpoint by the hysteresis value (e.g., falls below P1_high minus the hysteresis).https://store.unigulfsupply.com/product/xmav12l2135-pressure-sensor-pressure-switch/