Profibus PA Density Transmitter


The DT303 Profibus PA Density Transmitter is an instrument developed for the continuous, online measurement of liquid concentration and density, directly in the industrial process. Its pioneer technology consists of a capacitive type differential pressure transmitter coupled to a pair of pressure repeaters immersed in the process.

A temperature sensor located between the two pressure repeaters is used to compensate the temperature variations in the process fluid. A dedicated software, by means of an algorithm, calculates the fluid density. Depending on the industrial process, density may be expressed in Brix degree, Gay-Lussac degree, Baumé degree, Plato degree, concentration, etc.

The DT303 is designed for Profibus PA Digital Communication Protocol.

Some Characteristics:

Range 1: 0 to 3 g/cm³
Range 2: 0 to 10 g/cm³
Profibus PA, digital only, 31,25 kbit/s voltage mode with bus power
Range 1: ±0.0004 g/cm³ (±0.1 °Bx)
Range 2: ±0.0007 g/cm³
The configuration is made by remote configuration Simatic PDM and similar configuration devices
Power Supply
Bus Power 9-32 VDC
4 ½-digit numerical and 5-character alphanumerical LCD indicator
Wetted Parts
316 SS or Hastelloy
Temperature Limits
Ambient: -40 to 85 °C (-40 to 185 ºF)
Process: -20 to +150ºC (-4 to 302ºF)
Static Pressure Limit
70 kgf/cm² (7MPa) (1015 PSI)
Ambient Humidity Limits
0 to 100% RH
Process Connection
Industrial model: 316 SST flange ANSI B16.5
Sanitary mode: 304 SST Tri-clamp
Hazardous Area Certification
Explosion proof, weather proof and intrinsically safe
Side for Tanks and Top for Pipelines
Sanitary model: 4.5 kg (10 lb) - Industrial model: 8 kg (18 lb)


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