interscience
 

Digital Pressure Transmitter

VLL999-PT digital pressure transmitter is a highly precise and stable digital transmitter for the pressure measurement. This product utilizes the highly reliable piezo-resistive pressure sensing element and the high precision digital processing circuit, coupled with a dedicated algorithm, the transmitter is capable of high precision measurement. The product supports the measurement of both pressure and temperature and communicates via an RS485 interface. The transmitter consumes very low power and automatically enters standby mode when not communicating, and the power consumption at standby mode is as low as 10uA.

Digital Pressure Transmitter

VLL999-PT digital pressure transmitter is a highly precise and stable digital transmitter for the pressure measurement. This product utilizes the highly reliable piezo-resistive pressure sensing element and the high precision digital processing circuit, coupled with a dedicated algorithm, the transmitter is capable of high precision measurement. The product supports the measurement of both pressure and temperature and communicates via an RS485 interface. The transmitter consumes very low power and automatically enters standby mode when not communicating, and the power consumption at standby mode is as low as 10uA.

Features:

Features:

  • Extremely low consumption and available for auto stand-by mode
  • Integrated temperature measurement
  • Digital compensation and non-linearity correction
  • RS485 communication interface
  • Suitable for networking
  • Stainless steel housing, compact and light
  • Customizable

Specifications

Specifications

Model 

VLL999-PT

Measured range

-1bar…0bar ~ 0.1bar…100bar

Overpressure

≤1.5 times FS or 1100bar (min. value is valid)

Total accuracya

±0.25%FS (-10°C ~ 70°C)

Temperature accuracyb

 ±0.5°C -20°C ~ 80°C
±0.75°C (-30°C ~ -20°C)

 

Long-term stability

±0.25% FS/year

Compensation temperature

-10°C ~ 70°C

Operation temperature

-30°C ~ 80°C (4-pin angular connector model and 7-pin aviation plug model)
-10°C ~ 70°C (cable outlet model)

Storage temperature

-40°C ~ 85°C (4-pin angular connector model and 7-pin aviation plug model)
-20°C ~ 85°C (cable outlet model)

Power supply

3.6V ~ 28V DC

Output signal

RS485 (ModBus RTU or ASCII)

Load

RS485 terminal can cascade up to 99 transmitters

 

Electrical connection

4-pin Angular Connector (DIN43650)

7-pin Aviation Plug

Φ7.4mm shielded cable outlet

Insulation resistance

100MΩ @ 500V DC

Vibration

20g?20Hz ? 2000Hz

Shock

20g?11ms

Weight

~210g

Protection class

IP65?(Angular connector model?
IP68?Cable outlet model?
IP63?7-pin Aviation plug type?

Wetted material

Housing: Stainless steel 304
O-ring seal: Viton

a Total accuracy: including non-linearity, hysteresis, repeatability and temperature error.
b Temperature accuracy: measured temperature is ambient temperature.