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POLWAX DPT50 WM High-Precision Differential Pressure Transmitter

Differential Pressure Transmitters · DPT Series

DPT50 WM High-Precision Differential Pressure Transmitter

Model DPT50 WM / DPT100 WM / DPH100 WM

High-precision differential pressure transmitter for building automation, configurable via USB, with 4–20 mA and RS485 Modbus RTU.

Accuracy
0.25 % / 0.5 % of FS
Outputs
4–20 mA, RS485 / 0–10 V opt.
Config
USB interface
Weight
70 g
Request a Quote Request Datasheet

Overview

Differential pressure transmitters of the DPT50 series are designed for building automation in the HVAC/R sector — for pressure-based monitoring of air filters, fans and air flow. Ranges and units are configured via a USB interface.

The DPH100 WM version adds temperature and relative humidity measurement (T: -30 to 80 °C, RH: 0–100 %).

Key features

  • Accuracy 0.25 % / 0.5 % of FS
  • Configuration via USB interface
  • 4–20 mA (standard), 0–10 V (optional) and RS485 Modbus RTU
  • Selectable pressure units
  • Version with additional temperature & humidity (DPH100 WM)

Technical specifications

Measurement ranges & outputs

Measurement ranges and outputs
Accuracy (from applied pressure)0.25 % / 0.5 % of FS
Output4-20 mA (std.) / 0-10 V (optional)
Response time500 ms
Pressure limit1 PSI maximum
Media compatibilityAir, non-combustible, non-corrosive gases
DPH100 WM – temperature & humidityT: -30 to 80 °C & RH: 0-100 %

General

General specifications
SwitchDigital push button

Power supply & connectivity

Power supply and connectivity
CommunicationRS485 Modbus RTU
ConfigurationUSB interface
Supply voltage12 - 24 VDC
Signal connection3 wire
Load resistance47 to 470 Ω @ 24 VDC
Electrical connectionsScrew terminals

Installation & environment

Installation and environment
Process connectionPush-on connection for 3/16" ID tubing
MountingPanel mounting; DIN rail, wall and duct mounting options described
EnclosureABS
Weight70 g

Models

ModelPart codeMeasures
DPT50 WM0395 3300Differential pressure
DPT100 WM0395 3301Differential pressure
DPH100 WM0395 3302Differential pressure + temperature & humidity

Specifications are subject to change. Please check the current datasheet or ask our team before ordering.

Applications & industries

  • Building automation (HVAC/R)
  • Air filter monitoring
  • Fan and air-flow monitoring
  • Clean rooms

Scope of supply

  • Calibration certificate
  • GUI software
  • Manual

Product enquiry

Request a quote for DPT50 WM High-Precision Differential Pressure Transmitter

Tell us about your application — what you need to measure, the range, number of points and where the instrument will be installed. Our team will reply with a recommendation and quotation.

  • Technical advice on model and options
  • Quotation for your quantity
  • Datasheets and documentation on request

Required fields

For example: measured parameter, range, number of points, output signal, installation location.

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Model DPT30

Panel-mount differential pressure transmitter, ranges up to 0–700 mm WC, with alarm, 4–20 mA, 0–10 V, RS485 Modbus RTU and relay options.

Range
Up to 0–700 mm WC
Accuracy
±0.5 % FS (≥ 0–25 mm WC)
Outputs
4–20 mA, 0–10 V, RS485, relay
Mounting
Panel mounting

Applications: HVAC systems – airflow and filter monitoring · Clean rooms – contamination prevention · Industrial processes – filter and pump monitoring

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Model DPT20

Panel-mount differential pressure transmitter for air and non-corrosive gases, ranges up to 0–250 mm WC, with buzzer or 4–20 mA output.

Range
Up to 0–250 mm WC
Accuracy
±0.5 % FS (≥ 0–25 mm WC)
Output
Buzzer or 4–20 mA
Mounting
Panel mounting

Applications: HVAC systems – airflow and filter monitoring · Clean rooms – contamination prevention · Industrial processes – filter and pump monitoring

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Model RHT100

Industrial temperature and humidity transmitter with TFT display, RS485 Modbus RTU and wall or duct mounting.

Accuracy
±0.3 °C · ±1.8 % RH
Output
RS485 Modbus RTU
Display
TFT
Protection
IP65

Applications: HVAC systems & BMS integration · Cleanrooms & pharmaceutical environments · Warehouses & cold storage

View Details: ClimaTRANS RHT100 Temperature & Humidity Transmitter Request a Quote: ClimaTRANS RHT100 Temperature & Humidity Transmitter