Stationary
Pressure + temperature
PTS 500
2-in-1 pressure and temperature sensor with digital temperature compensation.
- Measuring range
- -1…0 / 0…1.6 / 0…10 / 0…16 / 0…50 bar
- Accuracy
- ± 0.5 % f.s.
- Temperature
- -20…+125 °C
- Outputs
- Modbus-RTU, PoE
- Home
- Measuring equipment
- Pressure and differential pressure
Pressure measurement
Pressure and differential pressure sensors
Every extra bar of pressure costs energy. CS Instruments pressure sensors show the pressure profile of the network, pressure drops across filters and dryers and compressor switching – analogue or digital.
- measuring ranges
- -1…400 bar
- of full scale
- ± 0.5 %
- Δp at which to replace the filter element
- 350 mbar
Why measure pressure
The pressure profile shows where energy is lost
Measuring pressure at the compressor outlet and at the consumers shows pressure drops in the network and control settings. Lowering an unnecessarily high pressure reduces energy consumption and leakage.
As a filter element is used, its differential pressure – and with it the energy cost – rises ever faster. The element must be replaced at 350 mbar at the latest (except activated carbon filters). At 0.7 bar differential pressure, the energy cost reaches 200 % of the element price.
- Timely filter replacementA differential pressure probe shows the actual condition of the element instead of replacing it by the calendar.
- Analogue or digital4…20 mA or Modbus-RTU, Ethernet and M-Bus for connection to a data logger or PLC.
- Seal-freeWelded measuring cells and stainless steel parts for a long service life.
- Pressure and temperaturePTS 500 measures both with one connection and digital temperature compensation.
CS Instruments models
CS Instruments pressure sensors
From digital sensors for data loggers to robust analogue transmitters and filter differential pressure probes.
Stationary
Digital pressure sensor
DPS 16
Pressure sensor with Modbus-RTU output for direct connection to a data logger or PLC.
- Measuring range
- 0…16 bar
- Accuracy
- ± 0.5 % / ± 1 %
- Long-term stability
- ± 0.2 % f.s./year
- Outputs
- Modbus-RTU
Stationary
Analogue pressure sensor
CS 16
Welded, seal-free measuring cell, 4…20 mA, from vacuum to 400 bar.
- Measuring range
- -1…400 bar
- Accuracy
- ± 0.5 % / ± 1 %
- Long-term stability
- ± 0.2 % f.s./year
- Outputs
- 4…20 mA, 2-wire
Stationary
Filter differential pressure
Δp 1.6 bar
Probe for monitoring the pressure drop across filters – replace the element at the right time.
- Measuring range
- 0…1.6 bar Δp
- Accuracy
- 2 % f.s.
- Pressure
- 10 bar
- Outputs
- 4…20 mA, 2-wire
Comparison
Pressure sensor comparison
| Model | Version | Measuring range | Accuracy | Outputs |
|---|---|---|---|---|
| PTS 500 | Stationary | -1…0 / 0…1.6 / 0…10 / 0…16 / 0…50 bar | ± 0.5 % f.s. | Modbus-RTU, PoE |
| DPS 16 | Stationary | 0…16 bar | ± 0.5 % / ± 1 % | Modbus-RTU |
| CS 16 | Stationary | -1…400 bar | ± 0.5 % / ± 1 % | 4…20 mA, 2-wire |
| Δp 1.6 bar | Stationary | 0…1.6 bar Δp | 2 % f.s. | 4…20 mA, 2-wire |
Measuring points
Where to measure pressure in a compressed air system
A few well-chosen measuring points give a clear picture of how the system performs.
After the compressors
Shows switching points, control and pressure band – the basis for optimising compressor control.
At filters and dryers
The differential pressure between inlet and outlet tells you when the filter element is clogged.
At consumers
Comparison with the pressure after the compressor shows the pressure drop in the distribution network and undersized pipes.
How to choose
How to choose a pressure sensor
Measuring range
Choose a range slightly above the maximum pressure – e.g. 0…16 bar for a network up to 10 bar.
Signal
For a PLC 4…20 mA (CS 16), for CS data loggers digital Modbus (DPS 16, PTS 500).
Temperature as well
If you also need temperature, one PTS 500 replaces two sensors.
Filters
For filter monitoring a 0…1.6 bar differential pressure probe with two hose connections.
FAQ
Pressure measurement questions
When should a filter element be replaced?
At a differential pressure of 350 mbar at the latest (except activated carbon filters). A higher differential pressure means the compressor has to run at a higher pressure, which quickly costs more than a new element.
How much energy does higher pressure cost?
Higher network pressure means higher compressor energy consumption and greater losses through leaks. Pressure measurement shows whether the pressure setting can be safely lowered.
Can a pressure sensor be connected to an existing data logger?
Yes. The CS 16 has a standard 4…20 mA signal, while the DPS 16 and PTS 500 have digital Modbus-RTU. DS 500 and DS 400 data loggers recognise and power CS sensors.
Related measurements
What else we measure in a compressed air system
Measuring devices
Tell us what you measure and we will propose the right instrument.
Fill in a short form and we will prepare a proposal for measurement equipment and implementation based on the medium, measuring range, and measurement objective.
Proposal of the right instrument type and measuring range
Measurement reports, trends, and interpretation of results
Supply, installation, calibration, and service
Where to find us
DirectionsPod lipami 4 · 1370 Logatec, Slovenija