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مستشعر الضغط التفاضلي
A compact electronic transmitter that compares two low-pressure air connections and sends the resulting differential-pressure signal to compatible cleanroom or HVAC controls.
- Two Independent Pressure Connections
- Ceramic Low-Pressure Sensing Cell
- Configurable Analog Signal
- Sealed Non-Display Enclosure
مقدمة المنتج
This differential pressure sensor uses one temperature-compensated ceramic sensing element to compare the air pressure applied to two separate hose ports. The compact non-display enclosure keeps the measurement electronics behind a gasketed service cover, while one green indicator reports basic operating status without turning the device into a local digital gauge. A bottom compression gland routes the supply and output conductors to a four-position screw terminal, and a four-switch selector bank supports the configured range or response setting. Four reinforced mounting holes secure the transmitter to a wall, duct panel or control backplate. The connected tubing, measurement span, supply voltage and output signal are chosen together for room-pressure, airflow or filter-loading duty.
الخصائص الرئيسية
A compact ceramic sensing element supports low-pressure air measurement without the mechanical pointer, movement and viewing window of an analog gauge.
The sealed polymer housing provides one controlled cable entry and a removable front cover for terminal access while keeping the normal installed face simple and easy to wipe.
Selectable span and response settings allow one enclosure format to serve room pressurization, filter condition or duct airflow monitoring when paired with the correct output configuration.
مخاوف المنتج للعملاء
Low differential-pressure measurements are sensitive to tubing errors, unsuitable range selection and mounting conditions, so the complete pressure path and electrical signal must be checked as one measurement loop.
Reversing the two pressure tubes makes the measured direction incorrect and can cause a control system to interpret a positive room pressure as negative.The high and low connections are identified by fixed color rings, and both tube routes are traced from the room or duct pickup points before energizing the loop.
A span that is much wider than the expected pressure difference reduces useful resolution around the operating setpoint.The configured pressure range is chosen close to the normal and alarm limits while retaining enough margin for startup and filter-loading excursions.
Kinked, leaking or moisture-filled tubing can create slow response, offset or apparently stable but false readings.Both hoses use equal, supported runs with airtight joints, open pickup tips and suitable routing that prevents sharp bends and trapped condensate.
Incorrect supply or output wiring can produce a valid-looking signal that is scaled differently from the receiving controller.Supply voltage, 4-20 mA or 0-10 V output type, terminal assignment and controller scaling are verified together before the value is used for alarms or control.
تطبيقات نموذجية
Cleanroom room-to-corridor pressure monitoringAir-handler filter differential-pressure sensingDuct static-pressure and airflow controlLaboratory and pharmaceutical ventilation systems
المعلمات الفنية
The following conservative ranges describe compact electronic transmitters for low differential pressure in air and non-aggressive gases; the final span, output and tubing connection are configured for the measurement duty.
| المواد الأساسية | Light-gray PC/ABS enclosure with ceramic differential-pressure sensing element, protected FR-4 circuit board and polymer hose connections |
|---|---|
| سمك اللوحة | 1.5-3.0 mm nominal molded enclosure-wall thickness |
| العرض الفعال | 100-130 mm nominal transmitter-body width excluding pressure ports |
| الحد الأقصى الطول | Up to 175 mm overall length including the bottom cable gland |
| الصلب يواجه سمك | 0 mm steel facing; the exposed enclosure is engineered polymer |
| الكثافة الأساسية | Approximately 1140-1190 kg/m³ for representative PC/ABS enclosure grades |
| الموصلية الحرارية | Approximately 0.18-0.24 W/(m·K) for representative PC/ABS enclosure materials |
| إنهاء السطح | Fine-textured wipeable light-gray housing, blue and red pressure-port rings, one green status lens and one matte-black cable gland |
| نوع المشترك | Four-hole fixed mounting with gasketed service cover, two independent hose-barb pressure inputs, one compression cable gland and one four-position screw terminal |
| التخصيص | متوفر على أساس التطبيق المقصود وبيئة التشغيل. |
الخيارات المتاحة
4-20 mA two-wire output0-10 V three-wire outputMultiple low-pressure measurement spansSelectable instantaneous or damped response
Planning a Differential Pressure Sensor specification?
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