• Flow sensor FLT-M1

Flow sensor FLT-M1

The FLT-M1 flow sensor employs Coriolis technology to measure mass flow in liquids and gases, fitting directly into flow pipes. It offers real-time data via Modbus TTL, making it suitable for precision-focused OEM applications in plant and machine construction.
型号 : FLT-M1

The FLT-M1 flow sensor has been designed to determine the mass flow of liquids and gases. This is done with a mini Coriolis measuring system with an S-shaped measuring tube and a temperature sensor. 

The flow sensor is installed directly in a flow pipe via a manufacturer-specific connection. If medium flows through the flow sensor, the measured value information is generated with the aid of Coriolis forces. The measured values are fed to the higher-level system via a Modbus TTL. 

It is possible to take flow measurements for pressure lines up to 100 bar at a measuring rate of 200 Hz (200 measured values per second). Flow changes are recorded with a step response time of 50 ms. 



Target audience 


This product is designed for OEM applications in the field of plant and machine construction, where measuring instruments with high quantities and smallest variance are required. The device has no intrinsic safety, as the flow sensor is designed for integration into a device or system.

Specification

Details

General


Measured values

Mass flow, Density, Temperature

Units of measurement

Adjustable

Performance


Max. measurement error

FLT-M1_i1

- Mass flow

±0.10% FM

- Zero-point stability of mass flow

±0.0007 kg/h

- Max. deviation of mass flow

±0.10% or ± 0.0007 kg/h

- Density

±5 kg/m³

- Temperature

±1.0 K

- Repeatability

FLT-M1_i1

- Mass flow

±0.05% FM

- Zero-point stability of mass flow

±0.00035 kg/h

- Max. deviation of mass flow

±0.05% or ± 0.00035 kg/h

- Density

±2.5 kg/m³

- Temperature

±0.5 K

Max. measurement error

FLT-M1_i2

- Mass flow

±0.10% FM

- Zero-point stability of mass flow

±0.0057 kg/h

- Max. deviation of mass flow

±0.10% or ± 0.0057 kg/h

- Density

±5 kg/m³

- Temperature

±1.0 K

- Repeatability

FLT-M1_i2

- Mass flow

±0.05% FM

- Zero-point stability of mass flow

±0.00285 kg/h

- Max. deviation of mass flow

±0.05% or ± 0.00285 kg/h

- Density

±2.5 kg/m³

- Temperature

±0.5 K

Temperature conditions


Permissible medium temperature

-10…+70 °C

Permissible ambient temperature

-10…+80 °C

Permissible storage temperature

-20…+85 °C

Range of application

FLT-M1_i1

FLT-M1_i2

Recommended flow measuring range

0…30 kg/h

0…120 kg/h

- Pressure loss as a function of flow rate

Max. 100 bar (rel.)

Max. 100 bar (rel.)

Inlet and outlet sections

No influence on measuring accuracy

No influence on measuring accuracy

Ambient conditions


Climate class

Not specified

Electromagnetic compatibility

Prepared for EMC 2014/30/EU (EN 61326-1)

Vibration and shock resistance

Prepared for standards:


- IEC/EN 60068-2-6


- IEC/EN 60068-2-27


- IEC/EN 60068-2-31


- IEC/EN 60068-2-64

Degree of protection

Housing is hermetically sealed, IP protection only when installed.

Dimensions

FLT-M1_i1

FLT-M1_i2

- Size

100 x 30 x 104 mm³

135 x 36.5 x 145 mm³

Weight

850 g

2150 g

Inner diameter of measuring tube

1.1 mm

2.5 mm

Materials


Housing

Stainless steel, 1.4301 (304L)

Wetted parts

Stainless steel, 1.4404/1.4435 (316L)

Option wetted parts for FLT-M1_i1

Alloy C22, 2.4602

Fluidic interfaces

Manufacturer-specific connection

Electrical interfaces


Connection

Solder pins with 1 mm diameter, 7-pole

Communication

Modbus TTL

Power supply

DC 10…35 V (max. 1 Watt), No galvanic isolation

Connection pin assignment


- Pin 1

V+ (Supply voltage)

- Pin 2

SDA (Modbus Tx)

- Pin 3

SCL (Modbus Rx)

- Pin 4

NC (Modbus T/R)

- Pin 5

CDI-Rx (Serial transmission, service interface)

- Pin 6

CDI-Tx (Serial reception, service interface)

- Pin 7

GND (Reference potential for all circuits)

Certificates and approvals


CE mark

The flow sensor is intended to act as an electronic component for integration into a device or system. The flow sensor is not a stand-alone measuring device and therefore does not require the CE mark to be affixed.

RoHS

Compliant with RoHS Directive

Zero point adjustment


- Description

Factory calibration provides excellent zero-point stability, no general adjustment required. Adjustment may be recommended in specific conditions.

- Preconditions for adjustment

- Measuring line is completely shut off. 

- Measuring tube is filled homogeneously and pressurized with at least 15 psi (gauge).

 - During the zero-point adjustment, stability of measured flow rate is monitored.

- Duration of adjustment

Approximately 20 s

- Abort conditions

Unsuitable process conditions

Flow damping

PT1 system, Factory default: 0 s

Low Flow Cutoff

Mass flow value cut off to zero when threshold is underrun. Overruns 150% of set threshold to reset. No status message when cutoff is active.

Empty Pipe Detection

Detects empty or partly filled measuring tube. Sets mass flow to zero and status message when density underruns set threshold. Left when mass flow overruns 150% of set threshold (hysteresis). No status message when active.


•Coriolis-based mass flow sensor for liquids and gases, ideal for OEM applications in plant and machine construction.
•Directly fits into flow pipes and provides real-time data through Modbus TTL communication.
•Features an S-shaped measuring tube and temperature sensor for accurate mass flow measurement.
•Measure flow in pressure lines up to 100 bar with a high measuring rate of 200 Hz and a rapid step response time of 50 ms.
•Measured values include mass flow, density, and temperature, with adjustable units of measurement.
•Max measurement errors of ±0.10% for mass flow and ±5 kg/m³ for density.
•Temperature range from -10°C to +70°C, making it suitable for various applications.
•Hermetically sealed and prepared for electromagnetic compatibility.
•Two variants, FLT-M1_i1 and FLT-M1_i2, with different flow measuring ranges to suit specific needs.

Dosing of delicate or expensive liquids 

Measuring: 

Dosing of delicate liquids consisting of several components. The flow components have been developed specifically for plant engineers. Highest precision with integrated electronics in combination with a very compact design. 

Customer benefit: 


  • Quality improvement: High-precision monitoring/dosing of the components
  • Optimizing the use of resources FLT-Mx Dosierung mit Durchflussmessgeraet 

flt-m1_dosierung_01_web.jpg


1. System for dosing and mixing of delicate and expensive liquid media.
2. Coriolis for monitoring the mass flow. In combination with a pump or a valve, a control circuit can be set up for optimal dosing.
3. Filling of media into suitable transport containers.

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