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Pressure

Longitudinal Measuring Pin M5

for contactfree measurement of cavity and injection pressures

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the right to make technical changes. Liability for consequential damage resulting

from the use of Kistler products is excluded.

Type 9247A...

Piezoelectric sensor for monitoring cavity and injection pres-

sures in the injection molding process. This compact, longitudi-

nally sensitive pin is used for indirect measurement of dynamic

pressures.

• Compact installation size

• Contact-free measurement of high pressures

• Cavity pressure measurement behind the cavity wall, with-

out imprint

• Indirect measurement of injection pressure in the nozzle

Description

The measuring pin is mounted with a precisely defined preload.

The strain in the surrounding material is transferred via the end

of the sensor and the external thread to the quartz sensing

element.

The electrical charge output is proportional to the change in

mechanical strain. A charge amplifier converts the charge into

a voltage signal that can be processed as required.

The sensitivity of the entire structural system must be analyzed

for an absolute pressure measurement. This means that the ex-

pansion or compressibility of the relevant structure, including

mounted measuring pin, must be determined, via a calculation

or comparison measurement.

Application

The Types 9247A0.8, 9247Asp, 9247AG and 9247AE are

used for the contactfree cavity pressure monitoring in injection

molds. They are installed behind the cavity wall in a blind hole

vertically to the contour. The compression of the mold steel

during the filling process is transferred to the measuring pin

and generates a pressure-proportional signal. The measuring

pin is therefore mainly used for components in which no im-

print is allowed on the surface.The high temperature variant

Type 9247AQ01 is used for monitoring the injection pressure

on injection molding machines. It is installed in a blind hole

tangential to the nozzle and measures the expansion of the

nozzle cylinder during injection.

Technical data

Range 1)

με

–1 400 … 1 400

Overload

με

±2 000

Axial preloading force

kN

≈3.3 (≈–20 000 pC)

Sensitivity (in test object)

pC/με

≈–8.6

Sensitivity to force

pC/N

≈–6

(for preload)

Reproducibility

%

<±1

of sensitivity when dismounting

and remounting

Linearity

%FSO

≤±2

Hysteresis

%FSO

≤3

Natural frequency

kHz

>200

Acceleration sensitivity

pC/g

<0.07

Operating temperature range

°C

–40 … 200

High temperature Type 9247AQ01

°C

–40 ... 300

Insulation resistance at 20°C

Ω

≥1013

Degree of protection

IP65

(with connected cable)

Weight

g

2.5

(without cable and preloading bolt)

Connection

M4x0.35 neg.

1) Sensor mounted with preload

Z12472-312

9247A

3.04.96

AL

M4 x 0,35

M5 x 0,5

6,1

SW5,5

4,4

3,5 h6