General data

TM07

3372

The VTU sensor is a piezoelectric ultrasonic dry-rundetection sensor with built-in thermal sensor andaccelerometer. The sensor is designed for continuoustracking of the self-resonance frequency of the frontmembrane and to provide other information, such astemperature and vibrations rate. The signalprocessing takes place in GiM CIU, and the VTU sensormust be connected to it to provide the data.

TM07

6341

VTU sensor connected to GiM CIU

Applications• Monitoring of multistage pumps

• condition monitoring systems

• test and measurement systems.

Features and benefits• Temperature detection

• dry-run detection

• vibration detection

• compact and robust design

• compatible with aqueous media.

Certificates• WRAS

• ACS

• NSF61

• NSF372

• DM174

• UBA.

Specifications

System conditions and environment

Liquid types Aqueous media

Liquid temperature, operation 0-90 ⁰C

Ambient temperature, operation -20 to +90 ⁰C

Humidity, relative 0-100 %, condensing conditions

Maximum system pressure 25 bar

Burst pressure 50 bar

Cable length < 3 m

Materials

Sensing element Pt100, silicon basedMEMS and piezo ceramic

Sealing EPDM (grade EP 1/1/5 BLK)

Housing Stainless steel (EN 1.4404 AISI316L)

Wetted materialsStainless steel (EN 1.4404 AISI316L)EPDM (grade EP 1/1/5 BLK).

Environmental standards

Enclosure class IP66 with connector

Vibration, non-destructive 20-2000 Hz, 10 G, 4 h

Temperature cycling IEC 60068-2-14

VTU sensor GRUNDFOS DATA SHEET

Electrical connections

567

1 82

3

4

TM07

3375

Male M12 8-pole connector with A-coding

Pos. Designation Description

1 DR Analog output from the ultrasonicsensor circuit

2 V+ Sensor supply voltage

3 GND Ground

4 Rw1 Connection No1 of 3-wire Pt100measurement

5 Rw2 Connection No2 of 3-wire Pt100measurement

6 Vout Analog output from the accelerometersensor circuit

7 GND Ground

8 GND Ground

(9) SHL Common cable shield

Dimensions

M12 x1

18

23.5

ISO 228 G1/2

18

51.5

23.5

1010

4.7

TM07

3377

Vibration sensing componentSingle-axis high-performance accelerometer with analogoutput.

Measurement range ± 50 g

Operating voltage range 3.0 - 5.25 VDC

Zero g output voltage Supply/2

Sensitivity (ratiometric to V+)40 mV/g at 25 ⁰C and V+ = 5 VOnly for the accelerometer.

Temperature sensingcomponent

Type Pt100 RTD

Class F0.1 (1/3B)

Temperature range-20 to +150 ⁰C *

Only for the thermal sensor.

TCR 0.003851

Configuration3 wires with GND as reference.Only for the accelerometer.

Accuracy (± 1 σ), in water, -20to +90 ⁰C ± 3 ⁰C

* This is only for out-of-range measurements above 90 ⁰C.

Dry-run sensing componentDry-run detection is performed by use of piezotechnology. By measuring the damping of the resonancefrequency (approx. 38 kHz), it is possible to determineif fluid is present at the sensor tip.

Impedance[Ω]

f [Hz] TM07

6339

The signal processing is performed by GiM CIU.

CalibrationThe VTU sensor does not need calibration.

99873130 06.2020ECM: 1284500

GRUNDFOS A/S · DK-8850 Bjerringbro · DenmarkTelephone: +45 87 50 14 00www.grundfos.com

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