Dwyer ISDP intrinsically safe differential pressure transmitter, 0.25 to 100 in w.c., 4–20 mA, LCD
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Quick overview
- Type: Pressure transmitters
- Signal / Protocol: 4–20 mA
- Hazardous area: Hazardous-area rated / option
- Genuine productsSourced from the manufacturer or authorised channels
- Delivery across BangladeshDhaka, Chattogram and all industrial zones
- After-sales supportInstallation guidance and warranty handling
- Reply within 24 hoursCall +880 1713 552466 or email hello@argonmark.com
Specifications
| General | |
|---|---|
| Part no. | BD-1543 |
| Category | Oil & Gas Instruments |
| Group | Instrumentation & Control |
| Brand | Dwyer |
| Model | ISDP |
| Technical | |
| Type | Pressure transmitters |
| Signal / Protocol | 4–20 mA |
| Hazardous area | Hazardous-area rated / option |
Datasheet
Technical features
| Measures air and non-corrosive gas pressure, velocity or volumetric flow in hazardous zones | |
| Menu-programmable | units, security level, K-factor for Pitot tubes and flow sensors, round or rectangular duct size |
|---|---|
| Loop powered via integral M12 4-pin connector | |
| Use with an approved IS galvanic isolator or Zener barrier | |
| NIST calibration certificate option | |
Applications
| Air pressure and flow monitoring in hazardous areas | |
| Duct velocity and volumetric flow with Pitot tubes | |
| Filter and room differential pressure in classified locations |
Key specifications
| Ranges | 0–0.25 in w.c. (62 Pa) to 0–100 in w.c. (24.9 kPa); bi-directional to ±10 in w.c. |
|---|---|
| Accuracy | ±0.5% at 25 °C |
| Output | 4–20 mA, 2-wire, 10–35 V DC |
| Display | 4-digit LCD, 15 mm; pressure, velocity or flow |
| Enclosure | Aluminium and glass, NEMA 4X (IP66) |
| Approvals | FM intrinsically safe Class I Div 1 Groups A–D; Class II Div 1 E–G; Class III Div 1 |
Specification
| Service | Air and non-corrosive gases |
|---|---|
| Accuracy | ±0.5% at 25 °C incl. hysteresis and repeatability |
| Stability | < ±1% per year |
| Pressure limits | ≤ 2.5 in w.c.: 2 psi; 5–50 in w.c.: 5 psi; 100 in w.c.: 9 psi |
| Temperature | 0–60 °C (compensated 0–60 °C); thermal effect 0.036%/°C |
| Power | 10–35 V DC loop |
| Output | 4–20 mA |
| Response time | 250 ms |
| Display | 4-digit LCD |
| Connections | M12 4-pin electrical; ⅛ in NPT female process |
| Wetted materials | Glass, PVC, silicon, alumina ceramic, epoxy, RTV, gold, aluminium, stainless steel, nickel (≥ 5 in); SS, silicone, gold, ceramic (≤ 1 in) |
| Enclosure | NEMA 4X (IP66); mount vertically |
| Weight | 1.19 kg |
| Approvals | FM IS Class I Div 1 A–D, Class II Div 1 E–G, Class III Div 1; CE |
Ranges
| Model | Range |
|---|---|
| ISDP-002 | 0–0.25 in w.c. |
| ISDP-004 | 0–1 in w.c. |
| ISDP-006 | 0–5 in w.c. |
| ISDP-007 | 0–10 in w.c. |
| ISDP-008 | 0–25 in w.c. |
| ISDP-009 | 0–50 in w.c. |
| ISDP-010 | 0–100 in w.c. |
| ISDP-012 … 017 | ±0.25, ±1, ±2.5, ±5, ±10 in w.c. |
Notes
| Data from the manufacturer's published datasheet. Confirm model, range, materials and approvals with Argonmark before ordering. |
Photo: courtesy of Dwyer, used with permission (source) — background removed by Argonmark. All photo credits
Description
The Dwyer ISDP is an intrinsically safe differential pressure transmitter for air and non-corrosive gases, approved by FM for Class I, II and III Division 1 hazardous locations. It covers 0–0.25 in w.c. (62 Pa) up to 0–100 in w.c. (about 25 kPa), including bi-directional ranges, with ±0.5% accuracy, and its LCD can show pressure, air velocity or volumetric flow.
It is loop powered (10–35 V DC) with a 4–20 mA output through an M12 connector, is set up from a simple menu (units, Pitot K-factor, duct size), and is housed in a NEMA 4X aluminium enclosure.
Argonmark Ltd supplies Dwyer instruments across Bangladesh — Dhaka, Chattogram, Gazipur, Narayanganj and the gas fields, refineries, terminals and power plants beyond. Send us the model, range, process connection, output and any hazardous-area requirement, and we will confirm the right configuration, lead time and price.
Questions & answers
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