Technical Data
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| Measuring Principle | Thermal |
| Product headline | Flow switch for liquid applications, intelligent / programmable; insertion style |
| Nominal diameter range | DN 25...1000 1"...40" |
| Max. measurement error | 2% - 10% (per measurement range) |
| Max. process pressure | 100 bar (1.740 psi) |
| Medium temperature range | -20...+85°C (-4...+185°F) CIP-able to 130°C / 266°F |
| Degree of protection | IP66 |
| Display/Operation | LED LCD-Display |
| Outputs | 1 x PNP switchable output + 1 x 4...20 mA analog output |
Product Overview
This flow switch is specially designed for the safe measurement, display and monitoring of the mass flow of liquid media with negligible pressure loss. It offers 1 or 2 switch outputs, or 1 switch output and 1 standard analog output for outputting flow or temperature values. Typical applications: monitoring of cooling water circulation and lubrication systems of pumps or heat exchangers, and leakage monitoring of process pipes.
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Advantages
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Negligible pressure loss
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FieldCare configuration software for fast setup and reliable storage of setpoints
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Selectable 4 to 20mA analog output for reading the flow percentage value
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Optional second switch output or 4 to 20mA analog output for temperature monitoring
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Digital display panel for online function check and process information display
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The housing top can be rotated 310°, equipped with a rotatable display panel for reading measured values from any direction
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Marine classification society approval
Spare Parts & Accessories 7
7 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| 71535688 | Gasket rubber cap CDI-connectorPacking unit: 5 pieces | Details |
| TXU10- | Instrument Commissioning Kit TXU10用于可以PC编程调试的设备 程序设置+用于带USB接口的PC的连接线 | Enquire |
| 51005148 | 5 m cable, 4x0.34 mm², PVC5米线缆，4x0.34m㎡，PVC M12x1 拐角航空插头， 螺栓 Cu Sn/NI，IP67 | Details |
| 71535693 | M12 elbow plug ready for cable, IP67, PG7 | Details |
| TA50- | Mounting parts, compression fitting TA50Screw in. | Enquire |
| 71535691 | Welded socket with collar, d6, PEEK, without screw | Details |
| 71535690 | Welded socket with collar d6 PEEK + screw | Details |
Configurator / Comparison
Source:Endress+Hauserwebsite public information
Manuals & Documents 10
All documents for this model10 documents · click to expand
BA Flowphant T DTT31, Flowphant T DTT35 Chinese
BA Flowphant T DTT31, Flowphant T DTT35 English
Operating Instructions Flow switch Flowphant T DTT31, DTT35 English
ReadWin® Quick Setup English
Operating Instructions Flow switch Flowphant T DTT31, DTT35 English
TI 焊接接头、过程转接头和法兰 Chinese
Flowphant T DTT31, DTT35 Chinese
TI Weld-in adapter, process adapter and flanges English
TI Flowphant T DTT31, Flowphant T DTT35 Flow switch English
Flowphant T DTT31, DTT35 Technical Information English
Case Studies
Municipal Wastewater Treatment · Thermal Gas Mass Flow Meters — Application Case
Customer Profile
The typical setting in Municipal Wastewater Treatment is the inlet, biological and outlet stages of a municipal plant. The measuring point is Thermal Gas Mass Flow Meters; the focus is mass flow of air and fuel gases.
Key Difficulties
Conditions are high solids and corrosive fractions, with large diurnal flow swings and, on top of that, effluent parameters drift and probes foul with sludge and biofilm, which a standard configuration cannot handle for long. The design therefore starts with choosing insertion or in-line type by gas composition, temperature and dust.
Implementation
The scope ran through the flow range: flow solution matched to line size, medium and range. Technically it hinges on choosing insertion or in-line type by gas composition, temperature and dust, and on these requirements: stable compliance with Grade 1A discharge limits and online data reporting.
Customer Benefit
In practice this means direct mass output, making combustion ratios more precise, which cut the workload on the site maintenance team.
Food & Beverage · Thermal Gas Mass Flow Meters — Application Case
Project Background
The project covers dosing, pasteurising, filling and CIP stages. The work centres on Thermal Gas Mass Flow Meters and the core task is mass flow of air and fuel gases.
Operating Challenges
The medium and duty are characterised by syrups, dairy and beverages that scale easily, under strict hygienic requirements, and frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles. So Thermal Gas Mass Flow Meters cannot be specified generically — it calls for choosing insertion or in-line type by gas composition, temperature and dust.
Solution
The Ainstru engineering team worked through the flow range: flow solution matched to line size, medium and range. The configuration involves choosing insertion or in-line type by gas composition, temperature and dust, with these requirements in view: food-safety and hygienic design per 3-A / EHEDG.
Results
Since start-up the system has run steadily; the practical result is direct mass output, making combustion ratios more precise.
Chemical & Pharmaceutical · Thermal Gas Mass Flow Meters — Application Case
Project Overview
The site is reactors, metering vessels and finished-product tanks. The customer wanted Thermal Gas Mass Flow Meters properly configured on the existing plant, with the aim of mass flow of air and fuel gases.
Technical Challenges
What actually causes trouble is highly corrosive media with solvents and crystallisation, partly in explosive atmospheres, and corrosion plus Ex protection shortens instrument life and makes downtime costly. All of this means the Thermal Gas Mass Flow Meters configuration has to involve choosing insertion or in-line type by gas composition, temperature and dust.
Configuration
Supply and installation were organised through the flow range: flow solution matched to line size, medium and range. On site this meant choosing insertion or in-line type by gas composition, temperature and dust, checked line by line against: Ex certification and GMP traceability of records.
Performance
After commissioning the outcome is direct mass output, making combustion ratios more precise, and the readings are now used for process tuning.
Power & Energy · Thermal Gas Mass Flow Meters — Application Case
Site Conditions
This is a Power & Energy customer whose plant is at boiler feedwater, turbine condensate and FGD/DeNOx systems. The main task was mass flow of air and fuel gases.
The Problem
The difficulty lies in high temperature and pressure with both steam and saline water; at the same time drift under high temperature and pressure, with very costly unplanned outages. Specification therefore means choosing insertion or in-line type by gas composition, temperature and dust.
What We Did
We took a flow range approach — flow solution matched to line size, medium and range. Delivery was built around choosing insertion or in-line type by gas composition, temperature and dust, with point-by-point checks on: compliance with power-industry codes and unit availability targets.
Operating Outcome
In service the system performs as intended — direct mass output, making combustion ratios more precise, with routine maintenance falling noticeably.
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