THMF Thermal Mass Flow Meter

THMF

THMF thermal mass flow meter measures gas mass flow and standard volume flow in industrial gas lines. It uses thermal dispersion / convective heat transfer technology to measure flow without separate temperature and pressure compensation in many suitable gas applications. Also, it supports insertion, hot-tapped insertion and flanged sensor styles, compact or remote construction, 4–20 mA, pulse, RS485 and HART outputs. As a result, it suits compressed air, nitrogen, biogas, process gas and plant utility gas monitoring.

  • Direct gas mass flow
  • Insertion / flanged options
  • Hot-tap installation support
  • 4–20 mA / RS485 / HART
  • Fast 1 second response

Gas type review

Pipe size selection

Flow range check

Output configuration help

Installation guidance

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  • THMF thermal mass flow meter for industrial gas measurement
  • Measures gas mass flow and standard volume flow
  • Suitable for various gases except acetylene, as per datasheet
  • Thermal dispersion / convective heat transfer measuring principle
  • Does not need separate temperature and pressure compensation for many suitable gas mass flow applications
  • Wide pipe size range from DN10 to DN4000 mm
  • Velocity range from 0.1 to 100 Nm/s
  • Accuracy range from ±1% to ±2.5%
  • Fast response time of 1 second
  • Standard insertion, hot-tapped insertion and flanged sensor options
  • Compact and remote construction options
  • Hot-tap installation and maintenance support
  • Dual power option with AC220V and DC24V
  • Good vibration resistance
  • Modular PCB design for easier repair
  • Insertion sensor with anti-flush-out design for high-pressure safety
  • 4-line LCD display for mass flow, standard volume flow, totalizer, date, time, working time and velocity
  • Output options include 4–20 mA, pulse, RS485 and HART
  • Alarm output with relay option
  • Suitable for compressed air, nitrogen, biogas, natural gas and suitable process gas applications
  • Compressed air flow measurement
  • Nitrogen gas flow monitoring
  • Biogas flow measurement
  • Natural gas flow monitoring
  • Process gas consumption tracking
  • Utility gas distribution monitoring
  • Boiler and furnace air / gas monitoring
  • Industrial energy management
  • Plant gas leakage and consumption analysis
  • Gas flow monitoring in large pipelines
  • Insertion gas flow measurement
  • Hot-tap gas line measurement, subject to site feasibility
  • Remote gas flow monitoring
  • Gas mass flow transmitter applications
  • Model: THMF
  • Product Type: Thermal Mass Flow Meter
  • Measurement Principle: Thermal dispersion / convective heat transfer
  • Measuring Medium: Various gases except acetylene
  • Pipe Size: DN10 to DN4000 mm
  • Velocity Range: 0.1 to 100 Nm/s
  • Accuracy: ±1% to ±2.5%
  • Sensor Working Temperature: -40°C to +220°C
  • Transmitter Working Temperature: -20°C to +45°C
  • Working Pressure: Insertion sensor ≤1.6 MPa; flanged sensor ≤1.6 MPa
  • Sensor Type: Standard insertion, hot-tapped insertion and flanged
  • Construction: Compact and remote
  • Compact Type Power Supply: 24VDC or 220VAC, power consumption ≤18W
  • Remote Type Power Supply: 220VAC, power consumption ≤19W
  • Response Time: 1 second
  • Output: 4–20 mA, pulse, RS485 and HART
  • 4–20 mA Output: Optoelectronic isolation, maximum load 500Ω
  • RS485 Output: Optoelectronic isolation
  • Alarm Output: 1–2 line relay, normally open state, 10A / 220V AC or 5A / 30V DC
  • Pipe Material Compatibility: Carbon steel, stainless steel, plastic and other suitable pipe materials
  • Display: 4-line LCD
  • Display Parameters: Mass flow, standard volume flow, flow totalizer, date and time, working time, velocity and related parameters
  • Installation Support: Easy installation, hot-tap installation and maintenance support
  • Special Safety Feature: Insertion with anti-flush-out design for high-pressure applications

    What Customers Say About Us

    Smooth Installation & Reliable Operation

    We recently used the THMF Thermal Mass Flow Meter in our plant application, and the installation process was smooth for our team. The product performance has been reliable during operation, and the delivery coordination was handled professionally.

    Mr. Amit Bhide
    Mr. Amit BhideSr. Manager – Projects
    Practical Solution for Gas Flow Measurement

    Our team is satisfied with the THMF Flow Meter for gas flow monitoring applications. The product quality, documentation support, and overall coordination from the company were very satisfactory throughout the process.

    Ms. Vinita Sharma
    Ms. Vinita SharmaSr. Manager - Quality Assurance
    Useful Features for Utility Monitoring

    We found the THMF Thermal Mass Flow Meter practical for regular utility monitoring in our plant operations. The communication options and integration support were helpful, and the material was delivered safely with proper packaging.

    Mr. B. Govinda Rajan
    Mr. B. Govinda RajanEngineer - Water Treatment Plant
    Reliable Product & Good Service Experience

    The THMF Flow Meter has been performing well in our gas measurement application during regular operations. The product design, timely delivery, and after-sales support experience from the Toshniwal team were handled efficiently.

    Amgoth Sai
    Amgoth SaiSr. Engineer - Operations
    Stable Measurement & Professional Coordination

    We recently used the THMF Meter for gas flow monitoring, and the readings have remained stable during operation. The packaging quality, delivery process, and technical guidance from the support team were very good.

    Mr. Murali G.
    Mr. Murali G.Dy. Manager - Maintaince

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    Frequently Asked Questions

    THMF thermal mass flow meter measures industrial gas mass flow and standard volume flow. It suits compressed air, nitrogen, biogas, natural gas and other suitable process gas applications.
    The datasheet states that THMF can measure various gases except acetylene. Users should confirm gas composition, moisture, dust and process conditions before final selection.
    THMF supports DN10 to DN4000 mm pipe sizes, depending on sensor type and installation arrangement.
    THMF supports standard insertion, hot-tapped insertion and flanged sensor types.
    The velocity range is 0.1 to 100 Nm/s.
    THMF supports 4–20 mA, pulse, RS485 and HART outputs. It also supports relay alarm output.
    Thermal mass technology measures gas mass flow directly in many suitable applications, so it generally does not need separate temperature and pressure compensation for standard gas mass flow output. However, users should confirm the application requirement and gas condition.
    Yes. THMF offers hot-tapped insertion sensor options for suitable applications. Users should confirm site feasibility, pressure condition and safety procedure before installation.
    Users should check gas type, pipe size, flow range, pressure, temperature, moisture, dust, gas composition, installation type, straight-run availability and output requirement before final selection.

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