Metal Tube Flowmeters

SC250

© TT electronics plc

General Note

TT Electronics reserves the right to make changes in product specification without

notice or liability. All information is subject to TT Electronics’ own data and is

considered accurate at time of going to print.

Issue C

02/2023 Page 8

TT Electronics | Roxspur Measurement & Control

2 Downgate Drive, Sheffield, South Yorkshire, S4 8BT, UK |Ph: +44 (0) 114-244-2521

www.ttelectronics.com | sheffield.admin@ttelectronics.com

Transmitter and Totalizer

Transmitter TH7T

The TH7T electronic transmitters provide an analog output

proportional to the flow rate and a digital output. They include

a display for volume totalization. They are based on the Hall

effect and mounted inside the indicator housing.

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TH7T

Transmitter + totalizer

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Optional HART protocol version available

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TH7TH

Transmitter + totalizer + HART protocol

TH7T Ex

Both limit switches AMD and electronic

transmitters TH7T can be mounted together in

the same housing.

The TH7T Ex transmitters belong to group II.

They are intended for use in potentially

explosive atmospheres, except in mining.

ATEX version (EX ia IIC T4 or T6)

Technical data

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ATEX certificate Ex II 1 GD

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Power supply: 14...30VDC, 2-wire system

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Power consumption: 4-20mA for 0… 100% of scale

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4-20mA analog output:

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Error: <0.6% of magnet position

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Maximum load in 4-20mA loop: 900Ω (with 30

VDC power supply)

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Totalizer: 8 digits, 4.5mm high. Reset by potential free

contact

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Ambient temperature: -5°C — 40°C

Float Damping System

(For gas and steam applications)

Ceramic, PEEK or metallic piston system for avoiding float

oscillations in flowmeters for gas and steam service,

obtaining stable readings even with very low working

pressures and low gas densities.

Available for DN15...DN80

 Upper float stop

 Float

 Piston

 Piston locking circlip

 Guide cylinder

 Circlips for locking upper float stop & guide cylinder

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Quality management System ISO 9001 certified by

Pressure Equipment Direction 97/23/CE certified by

ATEX European Directive 94/9/CE certified by

HART is a registered trademark of HART® Communication Foundation