Mold Cavity Pressure Sensor Unisens® ? with Front ø4 mm0 pages

Pressure

Mold Cavity Pressure Sensor
Unisens® with Front ø4 mm

Type 6157B...
Patent No. US 6,212,963

Quartz sensor for cavity pressures up to 2 000 bar for injection
molding of plastics.
•t
•t
t
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ideally suited for industrial applications
sensor front can be machined to adapt to the cavity wall
(except for coated versions of the sensor)
exchangeable cable

Description
The Unisens quartz sensor for mold cavity pressure Type
6157BE... has a front diameter of 4 mm. An O-ring seals the
annular gap of <10 µm between sensor and mounting bore
and thereby also center aligns the sensor in the bore.
The pressure acts over the entire front of the sensor and is
transmitted to the quartz measuring element, which produces a proportional electric charge (pC = Picocoloumb). This is
c
­ onverted into a voltage 0 ... 10 V in the amplifier and is then
available as an amplifier output.

For abrasive melts (e.g. filled with glass fibers or carbon fibers,
thermosets, BMC/SMC), these sensors are available as Types
6157BCE (0 ... 200 °C)/BD... (0 ... 300 °C) with a hardcoated
front.

All parts of the sensor are corrosion-resistant. The exchangeable cable is screwed to the sensor with a tight seal. The connector is self-locking and splash-proof.

Technical Data

For multi cavity applications the sensor Types 6157BA... and
6157BC... are used without the single-wire connector Typ
1839. The Multi Cavity Set Type 6829A... and the Multi Sensor System Type 6831B... are described in the appropriate data
sheets.

6157B_000-030e-09.12

This sensor is available with several Types of connecting cables
(see page 2).
Application
This diaphragm-free sensor measures mold cavity pressures
up to 2 000 bar during injection molding. It is particularly suitable for optimizing, monitoring and controlling the injection
molding process of thermoplastics, elastomers, thermosets and
SMC.

Ranget
Overloadt
Sensitivityt
Linearity, all rangest
Operating temperature ranget
t Mold (sensor, cable)
t Type 6157BA.../BC...t
t Type 6157BB.../BD...t
t Melt (at the front of the sensor)t
t Connectort
Insulation resistancet
t at 20 °Ct
t at 200 °Ct
t at 300 °Ct

bart
0 ... 2 000
bart
2 500
pC/bart–9,4
% FSOt
≤±1

°Ct
°Ct
°Ct
°Ct
Ωt
Ωt
Ωt

200
300
<450
0 ... 200*
>1013
>1012
>1010

*t uring machine down time the mold temperature may rise up to
D
240 °C, without causing any damage to the sensor. Note that measuring errors may temporarily result.

Page 1/6
This information corresponds to the current state of knowledge. Kistler reserves
the right to make technical changes. Liability for consequential damage resulting
from the use of Kistler products is excluded.

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