DPM mass flow meter
** For LOW DIFFERENTIAL PRESSURE models, please contact us **
DPM series digital multi-parameter mass flow meters provide accurate measurements of mass and volumetric flow rates, pressures and temperatures of process gases. DPM mass flow meters incorporate multi-parameter multi-gas functionality which allows users on site to select up to 30 different gases locally via optional OLED/Joystick interface, or remotely via the RS232/RS485 interface, or optional Modbus RTU interface. DPM flow meters support two programmable flow totalizers, low, high or range flow, temperature and pressure alarms, automatic zero adjustment (activated via local or communication interface), programmable SSR relay, programmable 0-5 Vdc, 0-10 Vdc or 4-20 mA analog outputs, user-programmable pulse output (via SSR), and extensive self-diagnostics. DPM mass flow meters feature multi-parameter/multi-gas functionality, ± (0.5% RD + 0.2%FS) standard accuracy, 200:1 turndown ratio and 10-20 ms response time. Used in a variety of industries: scientific and analytical applications, bioreactors and surface depositions, gas sampling, manufacturing and metrology activities. Significant savings are apparent, comparing the cost of a single DPM meter embodying these features, with that of acquiring and installing multiple, application-specific devices.
Principles of Operation
Operation of DPM flow meters is based on the measurement of the differential pressure across specially designed restrictor flow elements. The restrictor flow element is designed to establish laminar flow across the entire range of the instrument’s operation from 0 to 133% of full scale range.
A high accuracy and high resolution differential pressure sensor is utilized to measure pressure drop across a laminar flow channel, which is linearly proportional to volumetric flow rate. To convert volumetric flow into mass flow, high accuracy and high resolution absolute pressure and temperature sensors are utilized. Based on data from the sensors and gas properties from the built-in data base of the instrument, the microcontroller calculates volumetric and mass flow, which along with pressure and temperature parameters are available on the instrument display or via digital interfaces. In addition, the mass flow reading is accessible via the instrument analog interface which can be set by user to 0-5, 0-10 Vdc or 4-20mA mode.
DPM literature model DPM multi-parameter, multi-gas, differential pressure mass flow meter catalog page(s)
DPM Operating Manual Operating Manual DPM Intelligent Digital Mass Flow Meters - TD-DPM-1022, Oct-2022
DPCM Modbus Manual Operating Manual Modbus Interface DPC/DPM Instruments DPMC Modbus Manual - TD-DPCM-MB-0319, Mar-2019
DPM Configuration Utility DPM Configuration Utility Software Version 1.0.0.1 (Build 0.0.0.1)
User's Guide to DPM/DPC LabVIEW Driver Library User's Guide to DPM/DPC LabVIEW Driver Library (for DPM and DPC instruments) - TD-DPCM-0321-LVD Rev:A
DPCM LabVIEW Driver Library DPCM LabVIEW Driver Library Software (for DPM and DPC instruments) Version:1v1
Digital and Analog Flow Meters Catalog Full line Digital and Analog Flow Meters, Controllers, Valves and Accessories Catalog
Calibration Services Calibration Services
Rotameter Catalog Full line Rotameter and Valves Catalog
