The ACI A/DLP-001-W-U-N-A-3 is a differential low pressure transmitter built around a piezoresistive silicon sensing element, with up to 8 DIP-switch-selectable pressure ranges (0-0.1 to 0-1 in WC) configurable as either unidirectional or bidirectional. Field-selectable analog outputs include 4-20 mA, 0-5 VDC, and 0-10 VDC, all on the same unit. +/-0.5% FSO typical accuracy (including hysteresis, linearity, and repeatability at 71 F), front-cover pushbutton zero for in-place re-zeroing, and a flame-retardant polycarbonate enclosure with watertight cordgrip and hinged cover. This SKU ships with the A/PT-DLP duct-static pitot tube and A/DRC-DLP 35 mm DIN rail clip already included, making it the right pick for duct-airflow installations where both accessories are needed anyway.
WARRANTY
Key Features
8-Range, 3-Output DIP Configuration
Each unit supports up to 8 field-selectable pressure ranges via the SW3 DIP switch (0-0.1 to 0-1 in WC both unidirectional and bidirectional), plus 3 selectable output signals (4-20 mA, 0-5 VDC, 0-10 VDC) via SW1 and SW3. One part number covers many job requirements.
Piezoresistive Silicon Sensing
Solid-state silicon element with +/-0.5% FSO typical accuracy (hysteresis, linearity, and repeatability at 71 F included). Thermal effects are +/-0.067% FSO/F (0.12% FSO/C). Low warm-up drift, low long-term drift, stable across the 32-122 F compensated range.
Front-Panel Pushbutton Zero
Press-and-hold the SW2 ZERO button for 3+ seconds with no pressure applied to either port to re-zero the unit. Cancels installation offsets and long-term stress-relaxation drift in the silicon sensor element. Recommended periodically for highest accuracy.
Pitot Tube + DIN Rail Included
Ships with A/PT-DLP 7 in aluminum duct-static pitot tube (6.75 in insertion depth) and A/DRC-DLP 35 mm DIN rail clip. The pitot threads into the back of the enclosure for clean direct-mount duct airflow installation; the DIN rail clip lets the same unit panel-mount when needed.
Rugged Watertight Enclosure
Flame-retardant polycarbonate housing with UL94-5VA rating (more stringent than V-0). Watertight cordgrip pre-installed for the field wiring entry; the cordgrip can be removed to accept 1/2 in NPT conduit fittings instead. Hinged cover with integrated locking tab opens easily without tools.
Robust Overpressure Protection
Proof pressure: 270 in WC (67.2 kPa). Burst pressure: 415 in WC (103.3 kPa). The piezoresistive sensor tolerates significant overpressure events well above the maximum 1 in WC sensing range - protects against duct surge, fan startup transients, and accidental high-pressure mis-plumbing.
Selectable Range Options
This SKU offers 8 field-selectable ranges set via the internal DIP switch. Power must be off when changing the configuration:
| Range Type | Available Settings |
|---|---|
| Unidirectional ranges (4) | 0-0.1 in WC, 0-0.2 in WC, 0-0.5 in WC, 0-1 in WC |
| Bidirectional ranges (4) | +/-0.1 in WC, +/-0.2 in WC, +/-0.5 in WC, +/-1 in WC |
| Default (factory shipped) | 0-1 in WC (largest unidirectional) |
| Range selection method | DIP switch SW3 positions 1 and 2 (with position 5 = UNI or BI) |
Technical Specifications
| Specification | Value |
|---|---|
| Model | A/DLP-001-W-U-N-A-3 |
| Maximum Pressure (Sensor) | 1 in WC |
| Selectable Ranges (Unidirectional) | 0-0.1 in WC, 0-0.2 in WC, 0-0.5 in WC, 0-1 in WC |
| Selectable Ranges (Bidirectional) | +/-0.1 in WC, +/-0.2 in WC, +/-0.5 in WC, +/-1 in WC |
| Direction Mode | Unidirectional or Bidirectional, field-selectable via DIP switch SW3 position 5 |
| Accuracy | +/-0.5% FSO typical (includes hysteresis, linearity, repeatability at 71 F) |
| Output Signals | Field-selectable: 4-20 mA (2-wire loop), 0-5 VDC (3-wire), or 0-10 VDC (3-wire) |
| Supply Voltage | 4-20 mA: 16-36 VDC (250 ohm load) or 22-36 VDC (500 ohm load) / 24 VAC +/-10%, 50/60 Hz; 0-5 VDC and 0-10 VDC: 15-36 VDC into >5K ohm load / 24 VAC +/-10%, 50/60 Hz |
| Supply Current | 4-20 mA: 24 mA minimum (0.83 VA); 0-5/0-10 VDC: 6 mA maximum (0.18 VA) |
| Output Limit | 4-20 mA: 21.5 mA max; 0-5 VDC: 5.25 V max; 0-10 VDC: 10.5 V max |
| Sensor Type | Piezoresistive silicon |
| Compensated Temperature Range | 32 to 122 F (0 to 50 C) |
| Thermal Effects | +/-0.067% FSO/F (0.12% FSO/C), referenced to 71 F |
| Response Time (0-100% FSO) | 4 seconds |
| Output Update Rate | 0.5 second intervals |
| Zero Function | Front-panel SW2 pushbutton (3+ second press-and-hold) |
| Proof Pressure | 270 in WC (67.2 kPa) |
| Burst Pressure | 415 in WC (103.3 kPa) |
| Operating Temperature | -4 to 185 F (-20 to 85 C) |
| Operating Humidity | 10 to 95% RH, non-condensing |
| Storage Temperature | -22 to 185 F (-30 to 85 C) |
| Media | Dry air or inert non-conductive gases |
| Display | No LCD display (DIP-switch configuration only) |
| Pressure Fitting Material | Nickel-plated brass or stainless steel |
| Tubing Size Accepted | 1/4 in OD x 0.170 in ID poly tubing |
| Wiring Connections | 3-position finger-pushbutton (spring) terminal blocks, accepts 16-24 AWG wires |
| Conduit Entry | Watertight cordgrip installed (1/2 in NPT conduit accepted when cordgrip is removed) |
| Enclosure Material | Flame-retardant polycarbonate, UL94-5VA flammability rating |
| Dimensions (L x W x D) | 5.56 x 4.35 x 2.25 in (141.29 x 110.43 x 57.24 mm) |
| Weight | 0.80 lb (0.363 kg) |
| Included Accessories | A/PT-DLP pitot tube + A/DRC-DLP DIN rail clip |
| Approvals | CE, REACH, RoHS2, WEEE |
| Country of Origin | Made in USA - Middleton, Wisconsin |
| Warranty | 5-year limited |
| Manufacturer Part Number | A/DLP-001-W-U-N-A-3 |
Documentation
Frequently Asked Questions
What pressure ranges does the A/DLP-001-W-U-N-A-3 support?
How do I change the pressure range or output signal?
How and when should I zero the transmitter?
Does this version have a display?
What's included with the Pitot Tube + DIN Rail Clip version?
How do I wire the transmitter?
- Brand:
- ACI
- Series:
- DLP
- Product Type:
- Multi-Range Differential Low Pressure Transmitter
- Pressure Range Family:
- 0-0.1 to 0-1 in WC
- Maximum Pressure:
- 1 in WC
- Selectable Ranges (Unidirectional):
- 0-0.1 in WC, 0-0.2 in WC, 0-0.5 in WC, 0-1 in WC
- Selectable Ranges (Bidirectional):
- +/-0.1 in WC, +/-0.2 in WC, +/-0.5 in WC, +/-1 in WC
- Number of Selectable Ranges:
- 8 (4 uni + 4 bi)
- Direction Mode:
- Unidirectional or Bidirectional (DIP-switchable)
- Output Signals:
- 4-20 mA / 0-5 VDC / 0-10 VDC (field-selectable)
- Output Configuration:
- DIP-switchable via SW1 and SW3
- Accuracy:
- +/-0.5% FSO typical
- Display:
- No LCD display (DIP-switch configuration only)
- Accessories Included:
- Pitot Tube + DIN Rail Clip Included
- Sensor Type:
- Piezoresistive silicon
- Compensated Temperature:
- 32 to 122 F, 0 to 50 C
- Thermal Effects:
- +/-0.067% FSO/F
- Response Time:
- 4 seconds (0-100% FSO)
- Output Update Rate:
- 0.5 second intervals
- Zero Function:
- Front-panel SW2 pushbutton (3+ second hold)
- Proof Pressure:
- 270 in WC (67.2 kPa)
- Burst Pressure:
- 415 in WC (103.3 kPa)
- Operating Temperature:
- -4 to 185 F, -20 to 85 C
- Operating Humidity:
- 10 to 95% RH non-condensing
- Storage Temperature:
- -22 to 185 F, -30 to 85 C
- Media:
- Dry air and inert non-conductive gases
- Pressure Fittings:
- Nickel-plated brass or stainless steel
- Tubing Accepted:
- 1/4 in OD x 0.170 in ID poly
- Wiring:
- 3-position spring terminal blocks, 16-24 AWG
- Conduit Entry:
- Watertight cordgrip (1/2 in NPT compatible when cordgrip removed)
- Enclosure:
- Flame-retardant polycarbonate, UL94-5VA
- Dimensions:
- 5.56 x 4.35 x 2.25 in
- Weight:
- 0.80 lb (0.363 kg)
- Approvals:
- CE, REACH, RoHS2, WEEE
- Country of Origin:
- USA (Middleton, Wisconsin)
- Warranty:
- 5-year limited
