228A Baratron® 0.2 to 1000 Torr Differential Capacitance Manometers with 2 Trip Relays
Overview
The 228A Differential Baratron® is a general-purpose differential capacitance manometer is available in full-scale measurement ranges from 0.2 to 1000 Torr, two trip relays, and can be configured with a wide variety of fittings, input/output signals, and electrical connectors. It is mounted in a rugged industrial-grade housing that minimizes external RF/EM interference on the electronics.
- Differential pressure measurement from 1000 to 0.2 Torr
- Two independently-adjustable trip relays
- Three different analog output signals for unidirectional or bidirectional calibrations
- Gas composition independent pressure measurement
- Fully-welded Inconel® sensor resists corrosion
Products
| Compare | Description | Drawings, CAD & Specs | Availability | Price | |||
|---|---|---|---|---|---|---|---|
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228A11TBBBBFB3C0AA | $1,130.00 |
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228A12KBGBGFB7C1BB | $1,224.00 |
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228A22MGABBSU2C200 |
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228A51WCBCBFB5C1AB |
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Configuration Options
The following options are available for the 228A Baratron® Differential Capacitance Manometer.
Ordering Code Example: 228AXXXYYZZQSSTVRR
| Configuration Option | Option Code |
|---|---|
| 228A Baratron Differential Capacitance Manometer | 226B |
Pressure Range |
|
| 0.02 (kPA only) | U2 |
| 0.1 (kPA & inH2O only) | .1 |
| 0.2 (not available inH2O) | .2 |
| 0.5 (kPA & inH2O only) | .5 |
| 1 | 01 |
| 2 | 02 |
| 5 | 05 |
| 10 | 11 |
| 20 | 21 |
| 50 (not available for kPA) | 51 |
| 100 | 12 |
| 200 (not available for kPA & inH2O) | 22 |
| 500 (inH2O only) | 52 |
| 1000 (not available for kPA & inH2O) | 13 |
Engineering Units |
|
| Torr/mmHg | T |
| mbar | M |
| kPa | K |
| inH2O | W |
| cmH2O | R |
Reference Side Fitting (compatible with) |
|
| 0.25 in. OD tube | BB |
| 0.1875 in. OD tube | BG |
| 4 male VCR | CB |
| 4 female VCR | CD |
| 4 male VCO | DC |
| 4 female VCO | DD |
| 0.25 in. female NPT | FA |
| 0.25 in. male NPT | FB |
| 0.125 in. male NPT | FE |
| 0.125 in. female NPT | FF |
| NW16 KF | GA |
| 1.33 in. OD Conflat | HA |
Measurement Side Fitting (compatible with) |
|
| 0.25 in. OD tube | BB |
| 0.1875 in. OD tube | BG |
| 4 male VCR | CB |
| 4 female VCR | CD |
| 4 male VCO | DC |
| 4 female VCO | DD |
| 0.25 in. female NPT | FA |
| 0.25 in. male NPT | FB |
| 0.125 in. male NPT | FE |
| 0.125 in. female NPT | FF |
| NW16 KF | GA |
| 1.33 in. OD Conflat | HA |
Accuracy |
|
| 0.50% Full Scale (standard) | F |
| 0.30% Full Scale | K |
| 0.30% Reading (unidirectional calibrations only) | S |
Input/Output & Calibration |
|
| ±15 VDC input/0-1 VDC bidirectional output | B1 |
| ±15 VDC input/0-10 VDC bidirectional output | B2 |
| ±15 VDC input/0-5 VDC bidirectional output | B3 |
| +24-32 VDC excitation/4-20 mA bidirectional output | B4 |
| +24 VDC input/0-1 VDC bidirectional output | B5 |
| +24 VDC input/0-5 VDC bidirectional output | B7 |
| ±15 VDC input/0-1 VDC unidirectional output | U1 |
| ±15 VDC input/0-10 VDC unidirectional output | U2 |
| ±15 VDC input/0-5 VDC unidirectional output | U3 |
| +24-32 VDC excitation/4-20 mA unidirectional output | U4 |
| +24 VDC input/0-1 VDC unidirectional output | U5 |
| +24 VDC input/0-5 VDC unidirectional output | U7 |
Electrical Connector |
|
| 9-pin D-subminiature (standard) | A |
| Terminal block adaptor, 5-post | T |
| Flying lead adapter, 10 ft (3 m) length | L |
Mounting |
|
| No bracket | 0 |
| Mounting bracket, standard | 1 |
| Mounting bracket, slotted | 2 |
Trip Relay Settings |
|
| Trip A above 50% Full Scale, Trip B above 50% Full Scale* (default setting) | AA |
| Trip A above 50% Full Scale, Trip B below 50% Full Scale* | AB |
| Trip A below 50% Full Scale, Trip B below 50% Full Scale* | BB |
| Trip A below 50% Full Scale, Trip B above 50% Full Scale* | BA |
| *Contact factory for alternate trip relay settings | |
Specifications
-
TypePressure Transducer
-
Sensor TypeCapacitance Manometer
-
Measurement TypeDifferential
-
Full Scale Pressure Ranges0.2, 1, 2, 5, 10, 20, 50, 100, 200, and 1000 Torr and equivalents in kPa, mbar, inches H2O, and cm H2O
-
Analog Output0-1 VDC, 0-5 VDC, or 0-10 VDC > 10 kΩ load
-
Fitting TypeStandard: 1/4 inch OD (6.4 mm) tubes
Optional: Various -
Electrical Connector15-pin high-density D-subminiature
-
Resolution0.01% of Full Scale
-
Accuracy0.50% of Full Scale unidirectional or bidirectional standard
0.30% of Full Scale unidirectional or bidirectional
0.30% of Reading (unidirectional only) optional -
Zero Temperature Coefficient0.1% Full Scale/°C for standard accuracy specification
-
Span Temperature Coefficient0.04% of Reading/°C
-
Sensor Internal VolumeMeasurement Side (Px):1.4 cm
Reference Side (Pr):9.0 cm
(when equipped with standard 1/4-inch (6.4 mm) O.D. inlet and reference tubes) -
Operating Temperature Range0° to 50°C
-
Maximum OverpressureMeasurement Side (Px):120% of Full Scale or 20 psi (140 kPa), whichever is higher
Reference Side (Pr):120% of Full Scale -
Maximum Line Pressure40 psig (275 kPa)
-
Materials Exposed to Process GasesMeasurement Side (Px):Inconel
Reference Side (Pr):Inconel, ceramic, palladium, stainless steel, glass -
Trip PointsTwo process pressure trip points, independently adjustable from -100% to +100% of Full Scale
-
Trip RelaysDPDT contacts rated at 1.0 amps at 30 VDC or 0.3 amps at 120 VAC
-
Power Requirements±15VDC (±5%) or +16 to +30VDC @ 75 mA, ripple less than 20 mV
-
ComplianceCE, SEMI S2
Features
Resources
Literature
- 228A Baratron® Differential Capacitance Manometer Datasheet (239.6 kB, PDF)
Application Notes
- Pressure-based Leak Testing (201.7 kB, PDF)
Manuals
- MKS 226B & 228A Differential Transducers Manual (609.2 kB, PDF)
- 228A Differential Capacitance Manometer Pin-outs (24.5 kB, PDF)
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