The BAPI ZPS-LR-EZ-ST-IN is a field-configurable EZ Pressure Sensor designed for panel, DIN rail, Snaptrack, or surface mounting. This is the Low Range model with 10 field-selectable pressure ranges up to ±1.00” WC (5 unidirectional and 5 bidirectional) and five field-selectable output signals (4 to 20 mA, 0 to 5 VDC, 0 to 10 VDC, 2 to 10 VDC, or 1 to 5 VDC). Range, output, direction, and units (inches WC or Pascals) are all set via the front-panel rotary switch and NEXT button — no power required to configure. The LCD display reads live pressure over the full operational range regardless of the selected span. This configuration ships with a static pressure tube included, ready to connect to your high or low pressure port without a separate probe order. A NIST-traceable calibration certificate is available at no extra charge.
10 Ranges, Rotary Switch Config
Rotate to R1–R5 to select a unidirectional range up to ±1.00” WC, or set the +/- switch for bidirectional. The display shows the selected range for 2–4 seconds, then live pressure. No power needed to change settings — configure before wiring if needed.
Five Outputs, Panel-Optimized Size
Output is set via the OUT rotary position and NEXT button: 4 to 20 mA, 0 to 5 VDC, 0 to 10 VDC, 2 to 10 VDC, or 1 to 5 VDC. The EZ enclosure is about 1/3 the size of field-mount sensors, saving critical panel space. Pluggable terminal block accepts 14–24 AWG.
Static Tube Included + DIN Rail Mount
Ships with a static pressure tube, saving a separate probe line item on the BOM. Blue mounting tabs extend for DIN rail or surface mount, or push in for 2.75” Snaptrack — no tools required to switch modes. 3/16” barbed ports connect to standard 1/8”–3/16” ID tubing. NIST certificate available at no extra charge.
Full Specifications
| ZPS-LR-EZ-ST-IN EZ Pressure Sensor | |
|---|---|
| Manufacturer | Building Automation Products, Inc. (BAPI) |
| Series | EZ Pressure Sensor |
| Part Number | ZPS-LR-EZ-ST-IN |
| Sensor Type | True differential pressure, dry media only |
| Pressure Ranges | 10 field-selectable, up to ±1.00” WC (5 unidirectional + 5 bidirectional) |
| Accuracy | ±0.25% FS at 77°F (25°C) • ±0.005” WC (±1.24 Pa) |
| Total Error Band | ±1.25% FS or ±0.025” WC (±6.22 Pa) |
| Temp Hysteresis & Stability | ±0.35% at 77°F (25°C) for 1,000 hours |
| Output Signals | 4-20 mA / 0-5 VDC / 0-10 VDC / 2-10 VDC / 1-5 VDC (rotary switch selectable) |
| Power — 4-20 mA | 8 to 40 VDC |
| Power — 0-5 V / 1-5 V | 7 to 40 VDC or 6 to 28 VAC |
| Power — 0-10 V / 2-10 V | 12 to 40 VDC or 9 to 28 VAC |
| Power Consumption | 20 mA max DC (4-20 mA) • 4.9 mA max DC (VDC) • 0.12 VA max AC (VDC) |
| Load Resistance | 4-20 mA: 850Ω max @ 25 VDC • VDC outputs: 6 kΩ min |
| Display | LCD — shows live pressure over full operational range; plus rotary-switch status |
| Configuration | Rotary switch + NEXT button (no power required to set range/output) |
| Probe / Tube | Static Tube Included |
| Overpressure | Proof 270” WC (67 kPa) |
| Pressure Port | 3/16” barb (4.75 mm) — accepts 1/8”–3/16” ID tubing |
| Wiring | Removable/pluggable terminal block, 14–24 AWG; 2-wire (4-20 mA) or 3-wire (VDC) |
| Mounting | DIN Rail, 2.75” Snaptrack, or Surface (blue tabs extend/push for mode change) |
| Enclosure Material | ABS Plastic, UL94 V-0 |
| Enclosure Dimensions | 1.94 x 1.89 x 3.35” (49.2 x 48 x 85 mm) W x D x H |
| Operating Temperature | 14 to 131°F (−10 to 55°C) |
| Storage Temperature | −4 to 140°F (−20 to 60°C) |
| Humidity | 0 to 95% RH, non-condensing |
| Agency | RoHS, CE EN 61326-1:2013 EMC |
| NIST Certificate | Available at no extra charge |
| Warranty | 5 Years |
Field-Selectable Ranges
Rotate the switch to R1–R5 to select a unidirectional range. Set the +/- position to toggle bidirectional mode for the same five spans. All ranges and outputs can be changed without powering the unit.
| Switch | Unidirectional | Bidirectional |
|---|---|---|
| R1 | 0 to 0.10” WC | ±0.10” WC |
| R2 | 0 to 0.25” WC | ±0.25” WC |
| R3 | 0 to 0.50” WC | ±0.50” WC |
| R4 | 0 to 0.75” WC | ±0.75” WC |
| R5 | 0 to 1.00” WC | ±1.00” WC |
Frequently Asked Questions
What is the accuracy of the BAPI EZ Pressure Sensor Low Range?
±0.25% of full scale at 77°F (25°C), equivalent to ±0.005” WC (±1.24 Pa) for the Low Range. Total Error Band across the compensated range (32–122°F) is ±1.25% FS or ±0.025” WC (±6.22 Pa). This spec is valid after the initial 24-hour acclimation and auto-zero process. A NIST-traceable calibration certificate is available at no extra charge.
How do I set the output and pressure range on the EZ Pressure Sensor?
Use the front-panel rotary switch and NEXT button. To set the output, rotate to the OUT position and press NEXT until the desired output (4-20 mA, 0-5V, 1-5V, 0-10V, or 2-10V) shows on the display. For range, rotate to R1–R5. For directionality, rotate to the +/- position and press NEXT to toggle between unidirectional and bidirectional. No power is required to make these changes.
How is the EZ Pressure Sensor mounted?
The EZ mounts three ways using its blue adjustable tabs: pull the tabs out for DIN rail or surface mounting, or push them in for 2.75” Snaptrack mounting. No tools are required to switch modes. The enclosure is approximately 1/3 the size of standard field-mount pressure sensors, making it well-suited for tight panel spaces.
- Output Signal:
- 4-20 mA, 0-5 VDC, or 0-10 VDC
- Pressure Type:
- Differential
- Pressure Ranges:
- 0 to 1 Inch
- Media:
- Dry
- Accuracy:
- 0.25%
- LCD Display:
- LCD Display
- Zero Function:
- Yes
- Range Setting:
- Adjustable
- Communication:
- None
- Series:
- EX Series
