The SA-DPS digital pressure gauges combine the functions of a measuring gauge with a digital display and a pressure switch. They are designed for measuring excess and vacuum pressure in the system, pneumo-electric data conversion, displaying readings on the LCD, and transmitting a corresponding unified electronic analogue signal via current 4...20 mA or voltage 1...5 V, as well as two discrete transistor switching signals at the upper and lower set limits.
Standard SA-DPS digital pressure gauges are used both separately and for completing a precision air pressure regulator SA-RP in the preparation block. Installing an electronic pressure gauge allows the integration of a pneumatic system into the general SCADA production management system.
The digital vacuum gauge also features:
- a protective lock function, which prevents setting failures due to unintentional key presses;
- A power-saving mode that allows up to 20% energy savings.
The SA-DPS electronic gauge has a liquid crystal display for indication, divided into a main and additional screen. The main two-colour screen (red and green) shows the magnitude and units of the measured pressure. The device can display pressure in seven measurement units:
- kPa
- MPa
- bar
- kg/cm2
- mmHg
- inHg
- psi
The electronic gauge has a tubular cylindrical thread G1/8" (by default). On request, you can receive electronic gauges with a tapered thread R ⅛” or tapered thread NPT ⅛” for connection to a pneumatic line.
Table 1 — Operating Parameters of the SA-DPS Electromanometer
| Model |
SA-DPS210 |
SA-DPS201 |
SA-DPS__ |
| Nominal Pressure Range |
0...1 MPa
(0...10 bar) |
-100...100 kPa
(-1...1 bar) |
-101.3...0 kPa |
| Set Pressure Range |
0.100...1 MPa |
-101.0...101.0 kPa |
-101.3…10 kPa |
| Maximum Allowable Pressure |
1.5 MPa |
300 kPa |
| Operating Medium |
Clean compressed air, non-corrosive non-flammable gases |
| Pressure Setting Resolution |
kPa |
- |
0.1 |
| MPa |
0.001 |
- |
| kg/cm2 |
0.01 |
0.001 |
| bar |
| psi |
0.1 |
0.01 |
| mmHg |
- |
1 |
| inHg |
- |
0.1 |
Table 2 - Discrete Output of the Electronic Pressure Gauge
| Model |
SA-DPS-...RN
SA-DPS-...RV
SA-DPS-...RA |
SA-DPS-...RP
SA-DPS-...RB
SA-DPS-...RW |
| Type of Discrete Output |
NPN open collector |
PNP open collector |
| Output Power |
DC |
| Max Power Supply Voltage |
30 V |
24 V |
| Max Load Current: |
125 mA |
| Residual Voltage |
≤1.5 V |
| Number of Discrete Outputs |
2 Outputs |
| Repeatability |
±0.2% full scale ±1 digit |
Table 3 - Analogue Output of the Electronic Pressure Gauge
| Model |
SA-DPS-...RV
SA-DPS-...RW |
SA-DPS-...RA
SA-DPS-...RB |
| Type of Analogue Output |
Voltage |
Current
|
| Parameters |
from 1 to 5 V ± 2.5% f.s.* |
from 4 to 20 mA ± 2.5% f.s.* |
| Output Impedance: approx. 1 kΩ |
Max Load Resistance: 300 Ω at power supply voltage 12 V, 600 Ω at power supply voltage 24 V
Min Load Resistance: 50 Ω |
| Linearity |
±1% of the scale |
| Number of Analogue Outputs |
1 Output |
Notes:
* - full scale (within nominal pressure range)
