Electronic
Pressure Measurement
Model S-20
High Performance Pressure Transmitter for General Industrial Applications
WIKA Datasheet S-20
Applications
■■ General industrial applications
■■ Demanding research and development applications ■■ Harsh industrial environments
Special Features
■■ Measuring ranges from 0…10 to 0…20,000 psi (0 ... 0.4 |
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to 0 ... 1,600 bar) |
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■■ Non-linearity of up to 0.125 % B.F.S.L. |
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■■ Available output signals include 4 ... 20 mA, 0 ... 10 VDC, |
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1 ... 5 VDC and many others |
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■■ Industry standard electrical connections including |
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Model S-20 Pressure Transmitter |
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DIN 175301-803A L- connector, cables, housings and |
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many others |
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■■ Common USA and international process connections |
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available |
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Description
The model S-20 pressure transmitter is the ideal solution for customers with demanding performance requirements in many industrial applications.
It features high accuracy, a robust design and is available with an exceptional number of options that make it suitable for an extremely broad range of pressure measurement applications.
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High versatility
The model S-20 offers continuous measuring ranges between
0…10 psi and 0…20,000 psi (0 ... 0.4 and 0 ... 1,600 bar) in all common engineering units. Vacuum and compound ranges are also available.
These measuring ranges can be combined with virtually any standard industry output signal, common international process connections and a wide variety of electrical connections.
A large number of options are available including different accuracy classes, extended temperature ranges and customer specific pin assignments to provide compatibility with most industrial applications.
Data sheets showing similar products:
Pressure transmitter for general industrial applications; model A-10; see data sheet PE 81.60
WIKA Datasheet S-20 · 4/2013
High quality
The rugged design makes the model S-20 a highly reliable transmitter that is not affected by most adverse environmental conditions. This transmitter meets most application performance requirements when exposed to very low outdoor temperatures, extreme shock and vibration and aggressive media.
Availability
Variations of the S-20 described in this data sheet are usually available with short lead times. Inventory of popular designs are usually available for particularly urgent requirements.
Page 1 of 15
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Measuring ranges
Relative pressure ranges
psi |
0 … 10 |
0 |
… 15 |
0 |
… 25 |
0 |
… 30 |
0 |
… 50 |
0 |
… 60 |
0 |
… 100 |
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0 |
… 150 |
0 |
… 160 |
0 |
… 200 |
0 |
… 250 |
0 |
… 300 |
0 |
… 400 |
0 |
… 500 |
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0 |
… 600 |
0 |
… 750 |
0 |
… 1,000 |
0 |
… 1,500 |
0 |
… 2,000 |
0 |
… 3,000 |
0 |
… 4,000 |
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0 |
… 5,000 |
0 |
… 6,000 |
0 |
… 7,500 |
0 |
… 10,000 |
0 |
… 15,000 |
0 |
… 20,000 |
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bar |
0 ... 0.4 |
0 |
... 0.6 |
0 |
… 1 |
0 |
… 1.6 |
0 |
… 2.5 |
0 |
… 4 |
0 |
… 6 |
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0 |
… 10 |
0 |
… 16 |
0 |
… 25 |
0 |
… 40 |
0 |
… 60 |
0 |
… 100 |
0 |
… 160 |
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0 |
… 250 |
0 |
…. 400 |
0 |
… 600 |
0 |
… 1,000 |
0 |
… 1,600 |
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Absolute pressure ranges
psi |
0 |
… 10 |
0 |
… 15 |
0 |
… 25 |
0 |
… 30 |
0 |
… 50 |
0 |
… 60 |
0 |
… 100 |
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0 |
… 150 |
0 |
… 160 |
0 |
… 200 |
0 |
… 250 |
0 |
… 300 |
0 |
… 400 |
0 |
… 500 |
bar |
0 |
… 0.4 |
0 |
… 0.6 |
0 |
… 1 |
0 |
… 1.6 |
0 |
… 2.5 |
0 |
… 4 |
0 |
… 6 |
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0 |
… 10 |
0 |
… 16 |
0 |
… 25 |
0 |
… 40 |
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Vacuum and compound ranges
psi |
-30 inHg ... 0 |
-30 inHg ... +15 |
-30 inHg ... +30 |
-30 inHg ... +45 |
-30 inHg ... +60 |
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-30 inHg ... +100 |
-30 inHg ... +160 |
-30 inHg ... +200 |
-30 inHg ... +300 |
-30 inHg ... +500 |
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bar |
-0.4 … 0 |
-0.6 … 0 |
-1 |
… 0 |
-1 |
… +0.6 |
-1 |
… +1.5 |
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-1 |
… +3 |
-1 |
… +5 |
-1 |
… +9 |
-1 |
… +15 |
-1 |
… +24 |
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-1 |
… +39 |
-1 |
… +59 |
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The listed pressure ranges are also available in kg/cm2, kPa and MPa.
Special measuring ranges between 0 ... 10 and 0 ... 20,000 psi ( 0.4…1600 bar) are available on request. Special pressure ranges may have reduced long-term stability and increased temperature errors.
Overpressure limit
The overpressure limit depends on the specific sensor element used for the selected pressure range.A reduction in the overpressure safety rating may occur depending on the specific process connection and seal selected.A higher overpressure limit may provide a greater temperature error.
Measuring range < 150 psi/10 bar |
≥ 150 psi/10 bar |
3 times (standard) |
2 times 1) (standard) |
5 times |
3 times 2) 3) |
1)Restriction: max. 60 bar/870 psi with absolute pressure
2)Only possible for relative pressure measuring ranges ≤ 400 bar or 5,800 psi
3)Only possible for absolute pressure measuring ranges < 16 bar or 220 psi
Vacuum resistance
Yes
(No damage to sensor when vacuum is applied)
Page 2 of 15 |
WIKA Datasheet S-20 · 4/2013 |
Output signal
Signal type |
Signal |
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Current (2-wire) |
4 ... 20 mA |
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20 ... 4 mA |
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Voltage (3-wire) |
DC 0 ... 10 V |
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DC 0 ... 5 V |
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DC 1 ... 5 V |
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DC 0.5 ... 4.5 V |
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DC 1 ... 6 V |
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DC 10 ... 0 V |
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Ratiometric (3-wire) |
DC 0.5 ... 4.5 V |
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Other output signals on request. |
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Permissible load in Ω |
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■■ Current output (2-wire): |
≤ (power supply - 7.5V) / 0.023 A |
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≤ (power supply - 11.5V) / 0.023 A (with optional settling time of 1 ms) |
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■■ Voltage output (3-wire): |
> maximum output voltage / 1 mA |
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■■ Ratiometric output (3-wire): > 4.5k |
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Optional output signal limits |
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■■ 4 ... 20 mA signal: |
Minimum zero point setting: 3.6 mA 1), 3.8 mA, 4.0 mA |
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Maximum full scale setting: 20 mA, 21.5 mA, 23 mA |
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■■ DC 0 ... 10 V signal: |
Full scale: 10 VDC or 11.5 VDC |
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1) Not available with the zero point adjustment option
Voltage supply
Power supply
Maximum allowable power supply rating for cULus approval: 35 VDC (32 VDC with heavy-duty connector)
■■ Current output (2-wire) |
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4 ... |
20 mA: |
8 ... |
36 VDC (12 ... 36 VDC with optional 1 ms settling time) |
20 ... 4 mA (reverse output): |
8 ... |
36 VDC |
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■■ Voltage output (3-wire) |
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0 ... |
10 VDC: |
12 |
... 36 VDC |
0 ... |
5 VDC: |
8 ... |
36 VDC |
1 ... |
5 VDC: |
8 ... |
36 VDC |
0.5 ... |
4.5 VDC: |
8 ... |
36 VDC |
1 ... |
6 VDC: |
9 ... |
36 VDC |
10 ... |
0 VDC: |
12 ... |
36 VDC |
■■ 3-wire ratiometric output: |
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0.5 ... |
4.5 VDC: |
5 VDC ±10 % |
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Power dissipation (loss)
■■ Current output (2-wire):
■■ Voltage output (3-wire):
828 mW (22 mW/K derating of the power dissipation when ambient temperatures are ≥ 212 ° F/100 °C)
432 mW
Maximum current consumption
■■ Current output (2-wire): |
Current signal, max. 25 mA |
■■ Voltage output (3-wire): |
max. 12 mA |
WIKA Datasheet S-20 · 4/2013 |
Page 3 of 15 |
Reference conditions (per IEC 61298-1)
Temperature
59…77ºF (15…25ºC)
Barometric pressure
860 ... 1,060 mbar
Humidity
45 ... 75 % relative
Power supply
■■ 24 VDC
■■ 5 VDC for ratiometric output
Mounting position
Calibrated in vertical position with pressure connection facing down
Response time
Signal type |
Settling time per IEC 62594 |
Signal damping |
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Standard 1) |
Option 1 2) 3) |
Option 2 |
Current (2-wire) |
3 ms |
1 ms |
10, 50, 100, 500, 1,000, 5,000 ms |
Voltage (3-wire) |
2 ms |
1 ms |
10, 50, 100, 500, 1,000, 5,000 ms |
Ratiometric (3-wire) |
2 ms |
1 ms |
10, 50, 100, 500, 1,000, 5,000 ms |
1)3 dB limit frequency: 500 Hz
2)3 dB limit frequency: 1,000 Hz
3)Alternative specifications for 4 ...20 mA output signal: Load: ≤ (power supply - 11.5V) / 0.023 A
Power supply: DC 12 ... 36 V
Switch-on time (from power up to output signal)
150 ms
Switch-on drift time
5 s to reach stated accuracy (60 s with optional 0.1 % zero point adjustment)
Page 4 of 15 |
WIKA Datasheet S-20 · 4/2013 |
Accuracy data
Non-linearity (per IEC 61298-2) |
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Accuracy at calibration temperature |
BFSL |
Terminal method |
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≤ ±0.5 % of span (standard) |
≤ ±1.0 % of span |
≤ ±1.0 % of span |
≤ ±0.25 % of span |
≤ ±0.5 % of span |
≤ ±0.5 % of span |
≤ ±0.125 % of span 1) |
≤ ±0.25 % of span 1) |
≤ ±0.25 % of span 1) |
1)Restrictions for the non-linearity of 0.125 % BFSL or 0.25 % with terminal method: Available output signals: 4 ...20 mA and DC 0 ... 10 V
Available measuring ranges:All measuring ranges specified in the data sheet
For further output signals or measuring ranges, please ask the manufacturer
Calibration temperature
15 ...25 °C (standard)
4 °C ±5 °C
40 °C ±5 °C
60 °C ±5 °C
80 °C ±5 °C
Zero point adjustment
≤±0.2 % of span, factory setting (standard)
≤±0.1 % of span, factory setting 1)
±10 % of span, in 0.05 % increments, customer setting 2)
1)Restrictions for the optional factory set 0.1 % zero point adjustment: Only available with 4 ...20 mA and 0 ... 10 VDC output signals
Available measurement ranges:All relative pressure ranges specified in the data sheet. Not available in combination with the optional calibration temperature.
2)The “optional zero point adjustment access” is not available with every electrical connection, see “Electrical connections” for details.
Effect of mounting position on zero offset
For measuring ranges < 15 psi ( 1 bar), an additional zero offset of up to 0.15 % applies
Non-repeatability
≤ ±0.1 % of span
Temperature hysteresis
0.1 % of span at > 176 °F (80 °C)
Long-term drift (per IEC 61298-2)
■■ ≤ ±0.1 % of span
■■ ≤ ±0.2 % of span (with special measuring ranges)
Temperature error (for calibration temperature of 59…77 °F (15 ...25 °C))
For measuring ranges < 15 psi (1 bar), special measuring ranges and instruments with an increased overpressure limit the temperature error increases by 0.5 % of span
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Temperature error [%] |
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Medium temperature [°C] |
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WIKA Datasheet S-20 · 4/2013 |
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Page 5 of 15 |
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