The ACI A/DLP-010-W-U-D-A-0 is one of ACI's standard catalog DLP Series multi-range differential low pressure transmitters. Unlike the factory-calibrated custom-range variants, this SKU ships with 8 field-selectable ranges set via DIP switches: unidirectional (0-1" WC, 0-2" WC, 0-5" WC, 0-10" WC) or bidirectional (+/-1" WC, +/-2" WC, +/-5" WC, +/-10" WC). The transmitter also provides field-selectable output: 4-20 mA (2-wire loop powered), 0-5 VDC, or 0-10 VDC (both 3-wire) - one SKU works with any BAS controller. Sensing is via a piezoresistive silicon element with +/-0.5% FSO accuracy. This SKU has an integrated 5-digit LCD display for live pressure indication. Made in USA by ACI in Middleton, Wisconsin.
The standard multi-range catalog DLP variants are ideal for field service replacement, distributor stocking, and applications where the exact pressure range isn't known in advance. One SKU covers 8 different ranges (uni and bi), letting installers commission the system and select the appropriate range after seeing actual operating pressures. Per ACI's published applications: building and duct static pressure, filter monitoring, air flow measurement, and process control.
Key Features
One DLP unit covers 8 different ranges via DIP switches: 4 unidirectional (0-1" through 0-10") and 4 bidirectional (+/-1" through +/-10"). Reduces stocking complexity for distributors and service techs - one SKU handles a broad spectrum of applications. Switch ranges in the field after seeing actual operating pressures during commissioning.
Three output signals selectable on the same unit: 4-20 mA (2-wire loop powered, 16-36 VDC at 250 ohm load), 0-5 VDC (3-wire), or 0-10 VDC (3-wire). SW1 selects between current and voltage modes; SW3 position 4 selects between the two voltage ranges. One transmitter works with any BAS controller input.
A piezoresistive silicon sensing element provides linear analog output proportional to pressure, with excellent long-term stability and minimal warmup shift versus older diaphragm designs.
An integrated 5-digit LCD shows live pressure readings on the unit cover - useful for installation, commissioning, and field troubleshooting. AUTOZERO icon indicates zero-mode entry; OUT OF RANGE icon appears when differential exceeds the selected range. Engineering units (inWC or Pa) switchable via DIP SW3 position 3.
An on-board pushbutton ZERO performs in-place offset calibration. Hold for >3 seconds with no pressure at HI or LO fittings. Long-term drift is primarily offset (not span) - periodic re-zeroing eliminates drift without service interruption.
Spring-loaded finger-pushbutton terminal blocks accept 16-24 AWG wire - no screwdriver required. Watertight cordgrip installed; remove for 1/2" NPT conduit if needed.
Field-Selectable Ranges
| Mode (SW3 position 5) | Available Ranges (SW3 positions 1-2) |
|---|---|
| Unidirectional (UNI mode) | 0-1" WC, 0-2" WC, 0-5" WC, 0-10" WC |
| Bidirectional (BI mode) | +/-1" WC, +/-2" WC, +/-5" WC, +/-10" WC |
Default range: 0-10" WC unidirectional. All other ranges are selected via DIP switches SW1 and SW3 on the circuit board. In bidirectional mode, 0 differential = 50% of output range (12 mA / 2.5 V / 5 V). Power off the unit before changing DIP switches - new settings only take effect after power cycle.
Technical Specifications
| Specification | Detail |
|---|---|
| Sensor Style | Active differential low pressure transmitter, field-selectable multi-range |
| Sensing Element | Piezoresistive silicon |
| Pressure Ranges | Unidirectional: 0-1" WC, 0-2" WC, 0-5" WC, 0-10" WC. Bidirectional: +/-1" WC, +/-2" WC, +/-5" WC, +/-10" WC. Default range: 0-10" WC. Selected via SW1/SW3 DIP switches. |
| Output Signals | Field-selectable: 4-20 mA (2-wire), 0-5 VDC (3-wire), or 0-10 VDC (3-wire). Default: 4-20 mA. |
| Accuracy | +/-0.5% FSO (includes linearity, hysteresis, repeatability at 71 deg F) |
| Thermal Effects | +/-0.067% FSO per deg F (0.12% FSO per deg C) relative to 71 deg F |
| Response Time (0-100% FSO) | 4 seconds |
| Output Update Rate | 0.5 second intervals |
| Zero Function | Pushbutton ZERO (hold >3 sec) |
| Display | Yes - 5-Digit LCD on cover |
| Proof Pressure | 270 inWC (67.2 kPa) on 1" range, 350 inWC (87.12 kPa) on 10" range, 562 inWC (140 kPa) on 40" range |
| Burst Pressure | 415 inWC (103.3 kPa) on 1" range, 550 inWC (136.9 kPa) on 10" range, 1004.7 inWC (250 kPa) on 40" range |
| Power Supply | 4-20 mA: 16-36 VDC (250 ohm) or 22-36 VDC (500 ohm) or 24 VAC +/-10%. 0-5/0-10 VDC: 15-36 VDC into >5K ohm or 24 VAC +/-10%. |
| Supply Current | 4-20 mA: 24 mA min (0.83 VA). 0-5/0-10 VDC: 6 mA max (0.18 VA). |
| Operating Temperature | -4 to 185 deg F (-20 to 85 deg C) |
| Compensated Temperature Range | 32 to 122 deg F (0 to 50 deg C) |
| Storage Temperature | -22 to 185 deg F (-30 to 85 deg C) |
| Operating Humidity | 10-95% RH non-condensing |
| Media Compatibility | Non-corrosive, non-ionic gases (dry air, inert gases) |
| Pressure Fitting | Nickel-plated brass push-on, accepts 1/4" OD x 0.170" ID poly tubing |
| Enclosure | Flame-retardant polycarbonate, UL94-5VA |
| Conduit | Watertight cordgrip installed; accepts 1/2" NPT conduit when cordgrip removed |
| Wiring | Finger pushbutton (spring) terminal blocks, accepts 16-24 AWG |
| Dimensions | 5.56 x 4.35 x 2.25 in (141.29 x 110.43 x 57.24 mm); 6.21 in deep with cordgrip |
| Weight | 0.58 lb (0.263 kg) - LCD only |
| Approvals | CE, RoHS2, WEEE, REACH |
| Manufacturer | ACI (Automation Components, Inc.) - Middleton, WI USA |
| Manufacturer Part Number | A/DLP-010-W-U-D-A-0 |
| Warranty | 5-Year ACI Limited Warranty |
What's In the Box
- DLP transmitter (factory default range: 0-10" WC) with 8 field-selectable ranges via DIP switches
- Watertight cordgrip pre-installed (accepts 1/2" NPT conduit when removed)
- Two (2) #8 x 3/4" self-drilling panel-mount screws
- Installation & Operation Instructions
- 5-digit LCD display (integrated on enclosure cover)
- Pitot tube (if duct-mounted) - DLP-specific A/PT-DLP threads into back of enclosure
- DIN rail clip (if rail-mounting) - A/DRC-DLP (35 mm)
- Pressure-sense tubing (medical-grade clear PVC) - A/10' TUBE, A/20' TUBE, A/50' TUBE, A/100' TUBE
- Pickup ports: A/SP-PUP, A/R-PUP, A/R2-PUP, A/O-PUP-H, A/O-PUP-V
- Power supply transformer and BAS controller wiring
Documentation
Frequently Asked Questions
What ranges does the A/DLP-010-W-U-D-A-0 support?
This DLP unit has 8 field-selectable ranges via DIP switches: Unidirectional: 0-1", 0-2", 0-5", 0-10" WC. Bidirectional: +/-1", +/-2", +/-5", +/-10" WC. The factory default is 0-10" WC unidirectional. To change ranges: power off the unit, set SW3 positions 1-2 for range selection and position 5 for uni/bi, then power back on. Switch settings only take effect after power cycle.
Which output signal should I use?
All three outputs are available on this SKU - select via DIP switches: 4-20 mA (2-wire loop powered) is preferred for long cable runs and electrically noisy environments near VFDs. 0-10 VDC (3-wire) gives better resolution at the controller A/D for span-critical applications. 0-5 VDC (3-wire) is sometimes specified for legacy controllers. Use SW1 to select between mA and Vout, and SW3 position 4 to select between 5V and 10V.
Unidirectional vs Bidirectional - which should I select?
Unidirectional (SW3 position 5 = UNI) is correct for most HVAC applications where HI is always at higher pressure than LO: duct static, filter loading, room pressurization. Bidirectional (SW3 position 5 = BI) is needed when flow can reverse (reversible-flow systems, makeup-air with mode switching). In bi mode, 0 differential maps to mid-scale output (12 mA / 2.5 V / 5 V).
How do I zero the device?
Remove tubing from HI and LO fittings (or short them with a loop). Press and hold the ZERO button for more than 3 seconds, then release. For LCD variants, the AUTOZERO icon will appear on the screen and flash twice on success.
Are accessories included?
No accessories included. Order separately if needed: A/PT-DLP for duct-static pitot mounting, A/DRC-DLP for DIN rail mounting.
What accessories do I need for installation?
Required: pressure-sense tubing (A/10' TUBE, A/20' TUBE, A/50' TUBE, A/100' TUBE), 16-24 AWG shielded cable, 24 VAC or 15-36 VDC power supply. Application-dependent: pitot tube (A/PT-DLP 7" or generic pitot SKUs), DIN rail clip (A/DRC-DLP), pickup ports (A/SP-PUP, A/R-PUP, A/R2-PUP, A/O-PUP-H, A/O-PUP-V). Keep tubing under 75 feet.
What's the warranty?
5-Year ACI Limited Warranty. Manufactured in Middleton, Wisconsin, USA. ZOT Supply is an authorized ACI distributor.
- Series:
- DLP
- Pressure Range:
- 0-1 to 0-10 inch WC (selectable)
- Range Class:
- Medium (Multi-Range)
- Direction:
- Unidirectional or Bidirectional (field-selectable)
- Output Signal:
- 4-20 mA / 0-5 VDC / 0-10 VDC (selectable)
- Accuracy:
- +/-0.5% FSO
- Display:
- Yes (LCD)
- NIST Certificate:
- None
- Mounting:
- DIN Rail / Panel
- Made in USA:
- Yes
