Tecfluid AD Series User Manual

Flow switches

Series

AD 15 / ADI 15 / ADT 15

Mounting instructions

AD-15

Working principle
Series AD-15, ADI-15, ADT-15

If a fluid flows with enough flow rate through a metering
pipe A, with a mobile disc B and a calibrated spring C,
the disc will be displaced.

The distance depends on:

− The flow rate F.

− The relation between the areas A and B.

− The opposing force of the calibrated spring C.

− The equilibrium of the forces defines the position of

the calibrated disc B, and at the same time, the flow
rate.

The calibrated disc B has a magnet M. The magnetic
field acts on the alarms, the indicator or the transmitter.

A = Metering tube
B = Calibrated metering disc
C = Calibrated spring
F = Flow rate
M = Magnet

C-MI-AD15 Rev.:1

A

B

English version

ADI / ADT-15

C

M

F

Technical data

Once the electrical connection has been made

and the cable gland is tight, assemble in the

position the female connector (A) on the

male base (C). Don’t forget to put the rubber

1

2

Series AD-15, ADI-15, ADT-15

• Accuracy: ± 5% of full scale.

• Measuring range: 10:1,6

• Disc displacement: 40mm ± 5mm.

• Scales: In l/h, l/min, l/seg, m³/h,

%, etc.

• Mounting positions:
Vertical or horizontal. Flow rate in
any direction.

• Connections: From ¼” BSP to 2 ½” BSP.
Others on demand.

• Materials: Brass from 1/4” to 1”.
Aluminium from 1 1/4” to 2 1/2”.

(AISI-316, PTFE on demand)

• Maximum pressure: 16 bar.

• Maximum temperature:

100ºC continuous, 120ºC maximum.

• Alarms: - ¼” and ½” connections:
ADR-01: Reed 0,25A 125V 3VA

- ¾” to 2 ½” connections:
ADR-11: Reed 0,5A 250V 60VA
Polyamide housing with IP65
connector.
/1A = 1 alarm.
/2A = 2 alarms.

• Indicator: Needle on a graduated scale. Flow
rate units. Aluminium housing with
plastic window.

• Transmitter: 4-20 mA. 2-wires, linear scale,
series Halltec II.

HALL sensor without contact with
the metering system.

• Power supply: 15 to 50 Vdc.

• Temperature: -5 to +70ºC.

• Precision: Analog output respect the magnet

position: < 0.6%

• Maximum load in the 4-20 mA loop:
(Vs—10)/0.02 O
(Vs is the supply voltage).

• Consumption: Maximum 20 mA.

• Complies with 73 / 23 / CEE directive

Adjusting the set point

The switch housing has a line on the side next
to the graduated scale.

The position of this line indicates the value at
which the switch will act.

The switch is held in position by means of a
screw in a guide.

To adjust the position of the switch, loosen the
fixing screw and slide the switch to the desired
position.

Connection

In the female connector (A):
Terminal 1: Reed common.
Terminal 2: Normally closed.
Terminal 3: Normally open.
Earth terminal: No connection.

( Reed on zero position ).

3

Installation

correct
seal (B) between the connectors.

A

B

C