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Dwyer Instruments
Dwyer 629C Wet/Wet Differential Pressure Transmitter
Quote on request
No online payment · add lines to RFQ BOM
Wet/wet DP 0–5 to 500 psid; ±0.5% FS; 4–20 mA/V; NEMA 4X. RFQ + selection help.
Download datasheet PDF
RFQ cart holds BOM lines only. Submit for engineering quote.
Key parameters
Measuring range
Differential 0–5 psid through 0–500 psid plus 0.5–30 bar differential ranges
Accuracy
±0.5% FS (linearity, hysteresis, repeatability)
Output
2-wire 4–20 mA; 3-wire field-selectable 0–5 / 1–5 / 0–10 / 2–10 VDC
Process connection
1/4 in female or male NPT; optional remote sensors on 10 or 20 ft cable
Electrical connection
Removable terminal block; 1/2 in female NPT conduit
Wetted parts
316/316L SS without valve; with valve: Buna-N, PTFE, brass 360, copper, reinforced copolymer
Fits wet/wet differential pressure where you need a Dwyer 629C covering about 0–5 to 0–500 psid with ±0.5% FS accuracy, 4–20 mA or selectable voltage, and NEMA 4X packaging.
Key advantages
- Ranges — Differential 0–5 through 0–500 psid plus bar ranges
- Accuracy — ±0.5% FS
- Outputs — 2-wire 4–20 mA; 3-wire selectable 0–5/1–5/0–10/2–10 VDC
- Connections — 1/4 in FNPT/MNPT; optional remote sensors on 10/20 ft cable
- Features — Push-button zero; optional LCD; optional 3-way valve manifold; IP66
Typical applications
- Filter and pump DP on liquids.
- Wet/wet process differentials.
- Remote-sensor DP installs.
Selection guide
- Range — psid / bar chart
- Output — mA vs selectable V
- Manifold / LCD — Options
- Remote sensors — Cable length
Common mistakes
- Dry/dry expectation on wet/wet wetted path.
- Ignoring valve-manifold materials (Buna-N/brass).
- Wrong supply for 3-wire voltage mode.
When to RFQ / what to tell us
- Range, output, manifold/LCD/remote.
- Quantity and ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 24039 |
| Brand | Dwyer Instruments |
| Model | 629C Series |
| Product type | Differential Pressure Transmitter |
| Measuring range | Differential 0–5 psid through 0–500 psid plus 0.5–30 bar differential ranges |
| Accuracy | ±0.5% FS (linearity, hysteresis, repeatability) |
| Output | 2-wire 4–20 mA; 3-wire field-selectable 0–5 / 1–5 / 0–10 / 2–10 VDC |
| Process connection | 1/4 in female or male NPT; optional remote sensors on 10 or 20 ft cable |
| Wetted materials | 316/316L SS without valve; with valve: Buna-N, PTFE, brass 360, copper, reinforced copolymer |
| IP rating | NEMA 4X / IP66 |
| Ambient | 0–200 °F (−18–93 °C); compensated 0–175 °F (−18–79 °C) |
| Process temperature | 0–200 °F (−18–93 °C) service for compatible gases and liquids |
| Electrical | Removable terminal block; 1/2 in female NPT conduit |
| Response time | 400 ms |
| Power | 2-wire 10–35 VDC; 3-wire 13–35 VDC or isolated 16–33 VAC |
| Approvals | CE |
| Features | Push-button zero; optional LCD; optional 3-way valve manifold; remote-sensor option |
Documents
FAQ
Q: Wet/wet? A: Yes — compatible gases and liquids on both ports (material-dependent).
Q: Accuracy? A: ±0.5% FS.
Q: What should I send for a quote? A: Range/output/options, quantity, ship-to.
Links
| Parameter | Value |
|---|---|
| Measuring range | Differential 0–5 psid through 0–500 psid plus 0.5–30 bar differential ranges |
| Accuracy | ±0.5% FS (linearity, hysteresis, repeatability) |
| Output | 2-wire 4–20 mA; 3-wire field-selectable 0–5 / 1–5 / 0–10 / 2–10 VDC |
| Process connection | 1/4 in female or male NPT; optional remote sensors on 10 or 20 ft cable |
| Electrical connection | Removable terminal block; 1/2 in female NPT conduit |
| Wetted parts | 316/316L SS without valve; with valve: Buna-N, PTFE, brass 360, copper, reinforced copolymer |
| Protection | NEMA 4X / IP66 |
| Ambient temperature | 0–200 °F (−18–93 °C); compensated 0–175 °F (−18–79 °C) |
| Approvals | CE |
| Enclosure Material | Conduit housing designed to meet NEMA 4X (IP66) |
| Process Temperature | 0–200 °F (−18–93 °C) service for compatible gases and liquids |
| Response Time | 400 ms |
| Power Supply | 2-wire 10–35 VDC; 3-wire 13–35 VDC or isolated 16–33 VAC |
| Special Features | Push-button zero; optional LCD; optional 3-way valve manifold; remote-sensor option |