Overview:

    intrinsically safe metal tube float flowmeterThe (Metal Tube Rotameter) is a commonly used variable area flow measurement instrument in industrial automation process control. It features a compact size, wide measurement range, and ease of use. It is suitable for measuring the flow of liquids, gases, and steam, particularly for low flow rates and low volumes. Over the years, the metal tube float rotameter has been widely applied in industries such as petrochemicals, steel, power, metallurgy, light industry, food, pharmaceuticals, and water treatment, thanks to its excellent performance, reliability, and favorable performance-to-price ratio.

Flowmeter Type:

TF SeriesMetal Tube Float FlowmeterComposed of measuring tubes (sensors) and indicators (electronic converters), different types of measuring tubes and indicators can be selected to assemble into various complete units, catering to on-site requirements.

The TF series metal tube float flowmeters are divided into 5 types based on the direction of the fluid's inlet and outlet: vertical type, horizontal type (including horizontal T-type and horizontal spring type), bottom inlet-side outlet type, side inlet-side outlet type, and side inlet-top outlet type. Each type also features standard models, high-temperature models, jacketed models, and so on.

    For flow meters with a diameter less than DN50 (inclusive), choose a T-shaped structure; for diameters greater than DN50, select a spring structure.

Flowmeter Connection Specifications: The TF series metal tube float flowmeter standard model adopts the GB/T9119-2000 flange standard, which can be customized according to customer requirements; both threaded and clamp connection methods are also available.

Indicator Selection:

Users can choose from on-site display, electrical remote transmission, intrinsically safe, explosion-proof, or HART protocol-enabled models according to the actual site requirements. Detailed descriptions of the various indicators' functions are listed below.

Indicator Type

Instrument Function Description

M1 Model

Local pointer indicates flow rate; no power required, no 4~20mA remote transmission; optional flow alarm device; scale can be set for instantaneous flow value or percentage scale value.

M3 Model

Local digital display, battery-powered, no 4~20mA remote transmission, non-explosion-proof. LCD shows instantaneous and accumulated flow rates, on-site buttons to view and modify parameters. Battery can last for 6 months, replace the battery when the display shows the "T" character (battery model: ER26500, 3.6V, 7.5AH, -55℃~85℃).

M4 model

Electrical remote transmission, intrinsic safety design, explosion-proof marking ExdⅡCT6, optional HART protocol function. Powered by DC24V, with a local pointer indicating instantaneous flow and a digital display for both instantaneous and cumulative flow. Two-wire system with 4~20mA output. The panel features 4 buttons for viewing and modifying internal parameters. Detailed instructions on page 18.

M5 model

Electrical remote transmission, explosion-proof design, with explosion-proof marking ExdⅡCT6, optional HART protocol function. Powered by DC24V, features on-site pointer indicating instantaneous flow rate and digital display for both instantaneous and accumulated flow rates. Two-wire system with 4-20mA output. The panel is equipped with 4 buttons for viewing and modifying internal parameters.

Feature Highlights:

◆　Ideal for low-flow and small-diameter medium flow measurement ◆　Reliable operation, minimal maintenance, long lifespan

◆ Not strict requirements for straight pipe section ◆ Wide range ratio of 10:1

◆ Dual-line LCD display, instantaneous/accumulated flow rate display on-site ◆ Equipped with a keypad on the indicator, easy operation and setup

◆ All-metal structure, suitable for high temperatures, high pressures, and highly corrosive media ◆ Non-contact magnetic coupling transmission

◆ Suitable for flammable, explosive hazardous environments ◆ Available in DC power or battery-powered options

◆ Data recovery, data backup, and power failure protection features ◆ Multi-parameter calibration function

Technical Specifications:

Flowmeter Sizes: DN15, DN25, DN50, DN80, DN100, DN150 (other sizes available upon consultation with manufacturer)

Flow Range: Liquid: 1.0～150,000 liters/hour; Gas: 0.05～3,000 cubic meters/hour (for detailed flow range, see page 11 of the flow table)

Range ratio 10:1, 20:1 (special)

Accuracy: 1.5 Class, 1.0 Class (Special)

Pressure Ratings: DN15, DN25, DN50: 4.0MPa (max 20MPa)

DN80, DN100, DN150: 1.6 MPa (max: DN80: 10 MPa; DN100: 6.4 MPa; DN150: 4.0 MPa)

◆ Medium Temperature Standard: -30℃ to +120℃; High Temperature: 120℃ to 350℃

Power Supply: 24VDC (12-36VDC)

Output Signal: 4-20mA DC (two-wire system), HART protocol optional

Output Load 500Ω (at 24V power supply)

◆ Environmental Temperature: Local Type: -40℃～120℃; Remote Type: -30℃～60℃

Storage Conditions: Temperature: -40℃ to 85℃; Humidity: ≤85%

◆ Connection Type: Flanged Connection, Flange Standard: GB/T9119-2000, Users may (other connection types can be negotiated with the manufacturer)

Cable Interface M20x1.5

◆ Shell Protection IP65

◆ Explosion-proof Mark: Intrinsically Safe Type: ExiaIICT6, Flameproof Type: ExdIICT6

◆ Pressure Loss, see Flow Table

◆ Medium Viscosity: DN15: η < 5 mPa.s, DN25: η < 250 mPa.s, DN50-150: η < 300 mPa.s

◆ Material for Liquid Contact: R1: 304, 1Cr18Ni9Ti; Ro: 316, 0Cr18Ni12Mo2Ti

RL: 316L, 00Cr17Ni14Mo2Ti; Ti: titanium alloy; Rp: polytetrafluoroethylene lining.

Magnetic Filter

    If ferromagnetic particles are present in the medium, a magnetic filter should be installed before the flowmeter's inlet.