Model 178

Model 178 Product Introduction

The core component of the Alpha Model 178 series differential pressure sensor/transmitter is a capacitive pressure sensor, comprising a stainless steel diaphragm and a fixed electrode that together form a capacitor with capacitance varying under pressure. Utilizing Alpha's proprietary patented technology, the carefully designed sensor and its dedicated detection circuit ensure excellent temperature performance and long-term stability.

Model 178 Product Features

• Strong aluminum case, according to NEMA 4/IP65 standard

• 3-1/2 bit LCD display

• SS304 Embedded installation

• The positive/negative pressure end can withstand at least 100kPa overload without damage

• One key zero button

• Full protection of misconnection

• Environmental protection design, in line with ROHS standards

• Minimum pressure range of 10Pa

Model 178 Technical Data

The Alpha Model 178 differential pressure sensor/transmitter can measure both differential and gauge pressure, providing standard output options of 0–5V, 0–10V, and 4–20mA, along with custom outputs upon request. Its accuracy at room temperature is available in three grades: ±1.0%FS, 0.4%FS, or 0.25%FS. The device supports temperature compensation from 4 ℃ to 77 ℃, with temperature effects maintained below ±0.05%FS/℃.

Owing to its outstanding performance-price ratio, the Alpha Model 178 is widely used across multiple fields, including HVAC, environmental pollution control, clean engineering, medical instruments and equipment, oven pressurization and furnace pressure control, natural gas and pipeline network monitoring, underground ventilation, and power plant wind pressure monitoring.

Model 178 Product Specification Document

Access detailed technical information, configuration guides, and solutions notes to support your evaluation and implementation of the SB-2023 Series.

• Model 178 Datasheet

  Comprehensive technical specifications and detailed reference data for modules and components.

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• Model 178 Pinout

  Standard pin assignment, interface definition and signal pin functions for reliable connection.

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• Model 178 Circuit Diagram

  Complete wiring diagram, application schematic and typical connection scheme for design reference.

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