Application of Benchtop Multimeters in the Field of Pressure Sensors
The sensor industry is widely recognized both domestically and internationally as a promising high‑technology sector. It attracts global attention due to its high technical content, excellent economic benefits, strong penetration capability and broad market prospects. Manufacturers are now facing new opportunities and challenges. Beijing Delwei Technology is willing to grow alongside all manufacturers throughout this evolving industry, enabling Escort instruments to play an essential role in this field. Below is a brief introduction to the applications of Escort benchtop multimeters in the pressure sensor industry.
About Sensors
A sensor is a device that detects or responds to a specified measured quantity and converts it into a usable output signal according to a certain functional relationship. A sensor generally consists of a sensitive element that directly responds to the measured physical quantity, a conversion element that generates an available output signal, and corresponding electronic circuitry.
At present, most domestic pressure sensors feature an accuracy better than 0.25%, with a standard output signal of 4–20 mA current.
Pressure sensors include a wide variety of types, such as resistance strain gauge pressure sensors, semiconductor strain gauge pressure sensors, piezoresistive pressure sensors, capacitive pressure sensors, piezoelectric pressure sensors, resonant pressure sensors and optical fiber pressure sensors.
Before leaving the factory, pressure sensors undergo strict quality calibration and inspection to ensure they meet customer requirements and perform reliably under various industrial operating conditions. There are multiple inspection methods available. This article mainly introduces quality testing solutions using Escort benchtop multimeters.
Mainstream domestic pressure sensors require a voltage resolution as fine as 1 μV after signal conversion. For such demanding measurements, a minimum 5‑digit precision meter is required. The Escort‑3146A is a high‑precision 5½‑digit multimeter with 120,000 counts. Its DC voltage range (120 mV; accuracy: 0.012% + 5 digits) fully satisfies sensor calibration requirements in this process.
For the standard 4–20 mA current output of pressure sensors, the Escort‑3146A DC current range (12 mA; accuracy up to 0.05%) together with the auto‑ranging function enables convenient and efficient current testing. The resistance measurement resolution reaches as low as 1 mΩ, which is more than sufficient for trimming and adjusting resistance strain gauges.
The unique dual‑display function and high/low limit alarm function of the Escort‑3146A greatly improve convenience during production workflows.
It can be clearly concluded that the Escort‑3146A fully meets production requirements for key calibration procedures of pressure sensors. Meanwhile, its outstanding cost performance not only satisfies high‑level technical measurement needs but also helps manufacturers reduce costs, making it the ideal choice for sensor manufacturing enterprises.
