Differential pressure transmitter makes use of advanced capacitive sensor technology and is capable of measuring all three media phases – liquids, gasses, and steam. The ALDPT-3051 includes an array of features including self-diagnostic capability, field-adjustable parameter settings, and auto-zeroing at a much lower price versus competitive offerings.
Available outputs include 4-20 mA, 1-5 VDC, HART, and Foundation Fieldbus. The wide selection of materials of construction, optional accessories, and communication outputs available for the ALDPT-3051 make it suitable for nearly any differential pressure measurement application.

| Measuring range: | 0~1kPa~2MPa |
| Fluid: | liquid, gas and steam |
| Ambient temperature: | -22~185°F (–30°~85°C); -4~149°F (20°~65°C) Fluorine Line |
| Fluid media: | liquid, gas and steam |
| Accuracy grades: | 0.075%, 0.2%. 0.5% |
| Process flange: | SS# 304, SS# 316-optional |
| Turn-down: | 100:1 |
| Drift (Micro): | 0.02% FS/year; Standard: 0.025% FS/year |
| Relative humidity: | 0 ~ 100% RH |
| Damping time: | 2 sec |
| Protection: | IP67/NEMA 6 |
| Start time: | 2 seconds after power up |
| Field indication: | LCD |
| Storage temperature: | -58~185°F (50~85°C) No display; -40~185°F (-40~85°C) LCD display |
| Weight: | 7.25 ~11lbs (3.3 ~ 5kg) |
| Working voltage: | (12~36 ) VDC —Blind type; (15~30 ) VDC; LCD type |
| Isolation diaphragm: | SS# 316 or Hastelloy C |
| Nuts & bolts materials: | Stainless steel |
| Communications distance: | 2 km when using CEV cable; Load capacity: below 0.22μF; Load inductance: below 3.3 mH |
| Approvals: | ExdIICT6 -ATEX, ExiaIICT4 -ATEX |
| Transmitter housing: | Aluminum with epoxy coating; Spacing with power line: 15 cm; Resolution: 0.05% of range |
| Fill Fluid: | Silicon oil, fluorocarbon oil |
| O-ring materials: | Nitrile, Viton, PTFE |
| Effects: | Effect of environmental temperature: Zero drift: 0.5% FS/50°C; Range drift: 0.7% FS/50°C; Effect of power voltage variation: ±0.005% FS/V |
| Output signals: | 4~20 mA DC two wire |