Dwyer MSX Pro Pressure Transmitter (Model: MSX-20W-PA)
Product Introduction
The Dwyer MSX Pro Pressure Transmitter (MSX-20W-PA) is a versatile
Magnesense differential pressure sensor designed for building
control applications, monitoring differential pressure, air
velocity, and volumetric flow. Built on the stability of the MS2
Magnesense II series, it simplifies configuration with 32
selectable pressure ranges (Pa, mm w.c., in w.c.) in
unidirectional/bidirectional modes. The transmitter offers linear
pressure or velocity outputs with square root extraction for flow
calculations, dual voltage/milliamp signals for control and
verification, and a rotatable 4-digit LCD for easy readability.
Suitable for air and non-combustible gases, it meets UL94 V-0 and
plenum ratings for safety.
Product Features
Precision Measurement Capability:
Monitors differential pressure, air velocity, and volumetric flow
in building systems.
±1% FSO accuracy for reliable readings across 32 pressure ranges
(Pa, mm w.c., in w.c.).
Configurable Output Modes:
Linear pressure output or velocity output with square root
extraction for flow calculation.
Dual signals: 4–20 mA (2-wire) and selectable 0–10 V/0–5 V (3-wire)
for control and signal verification.
Flexible Installation & Operation:
10–36 VDC (2-wire) or 17–36 VDC/21.6–33 VAC (3-wire) power input.
1/2" NPS thread electrical entry and orientation-independent
mounting.
User-Friendly Interface:
4-digit LCD with 180° rotatable display for optimal visibility in
any installation.
Optional toolless terminal block for quick wiring.
Safety & Environmental Ratings:
UL94 V-0 fire rating and plenum-rated materials for hazardous
environments.
Pressure limits: Up to 3.6 psi (operation) and 6 psi (burst) for
select ranges.
Application Versatility:
Ideal for filter monitoring, clean room pressure control, duct
static pressure, and VAV system airflow.
Electrical Specifications:
Current output loop resistance: 0–1250 Ω max; voltage output: min.
1 kΩ load resistance.
| Product name | Pressure Trasmitter |
| Service | Air and non-combustible, compatible gases |
| Accuracy | ±1% FSO |
| Power Requirements | 10-36 VDC (2-wire), 17-36 VDC or isolated 21.6-33 VAC (3-wire) |
| Output Signals | 4-20 mA (2-wire); 0-10 V or 0-5 V selectable (3-wire). |
| Electrical Entry | 1/2" NPS thread |
| Display | 4 digit LCD. |
| Mounting Orientation | Pressure sensor measurement unaffected by orientation |
