Subject to change · 60.40-e · 0215

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DG 060 · DG 061 · DG 062 · DG 063 · DG 064

for Pressure and High Pressure Filters · Operating pressure up to 600 bar · Response/switching pressure up to 5,0 bar

Clogging Indicators

Application

Monitoring the contamination of pressure and high pressure

ﬁlters.

General

Filter elements installed in hydraulic ﬁlters remove dirt from a

hydraulic system and therefore become contaminated themsel-

ves. Free pores or spaces in the ﬁlter material are obstructed by

dirt parti cles, which causes a continuous increase in the pressure

loss.

The dirt load collected in a ﬁlter element gradually increases

during service, which also leads to a higher pressure drop. The

resulting differential pressure ∆p is monitored by a clogging

indicator. Once a preset value is reached, an electrical and/or

optical signal is generated.

The following must be observed in this context:

The pressure drop caused by the ﬁlter element increases

depending on the ﬂow rate, the dirt load, and the viscosity of

the pressure ﬂuid.

Therefore, a ﬁlter element is not regarded contaminated before

the clogging indicator responds at operating temperature of the

hydraulic system, causing a continuous signal.

Consequences of an overdue ﬁlter element change

For ﬁlters equipped with a bypass valve:

The more dirt has collected in the ﬁlter element, the more

frequently the bypass valve opens and part of the hydraulic ﬂuid

remains unﬁltered. The high pressure loss causes unnecessary

power consumption.

For ﬁlters without a bypass valve:

The increasing pressure loss across the ﬁlter element, which

reduces the efﬁciency of the hydraulic system, eventually causes

malfunctions to occur or a pressure relief valve to respond.

Description

100

10095

Response range of clogging indicator

Typical development of dirt accumulation in a

ﬁlter element during its service life

Service life [%]

Differential pressure [%]

Clogging indicators

DG 062 and DG 064

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Special design features

Piston seal:

The piston actuated by the differential pressure is equipped with

a leak-free O-ring seal. As a result, the total ﬂow passes the ﬁlter

element.

Proximity position sensing:

Piston movement is detected by sensing a magnetic ﬁeld, i.e.

without mechanical contact. For this reason, ARGO-HYTOS

clogging indicators are absolutely leakfree.

Characteristics

Operating pressure

0 ... 420 bar, min. 10

pressure cycles

Nominal pressure according to DIN 24550

0 ... 600 bar, min. 10

pressure cycles

Quasi-static operating pressure

Connection

Proﬁled bore, see section Dimensions

Hydraulic ﬂuids

Mineral oil and biodegradable ﬂuids

(HEES and HETG, see info-sheet 00.20)

Temperature range of ﬂuids

-30 °C ... +100 °C (short term 125 °C)

Ambient temperature range

-30 °C ... +80 °C

Materials

Housing: Stainless steel

Piston: Polyamide

Socket: Polyamide

Display piece DG 062 / DG 064 Polyamide

Seals: NBR (FPM on request)

Operating voltage

max. 48 V DC

Electrical service life

switching cycles

Electrical protection

IP 67 (in connected condition) for DG 060, DG 061, DG 062

Exception: IP 65 (with mounted and secured socket)

for versions with connector socket according

to DIN EN 175301-803.

Mounting position

No limitation

Design and principle of operation

Within the clogging indicator, the differential pressure

∆p = p

- p

(pressure upstream of the element minus pressure

downstream of the element) caused by the ﬁlter element acts on

a magnetic piston against the force of a spring.

In optical (mechanical) clogging indicators, the increasing

differential pressure causes the piston to approach a second

magnet with reversed polarity which in turn causes the indicator

to change from green to red.

In electrical clogging indicators, the magnetic piston triggers a

reed switch.

Current limiter for DC and AC voltage:

If light bulbs or other loads are connected over long distances (conductor capacity!),

a protective resistor should be connected in series in order to limit the current.

The same applies when capacitance loads are connected.

Spark suppression in DC applications:

The contacts of Reed switches open extremely fast, causing voltage peaks to be induced

when switching off inductive loads, such as relays, lifting magnets, or solenoid valves.

The resulting self-induction currents are short-circuited by connecting a diode in parellel

to the inductive load.

Spark suppression in AC applications:

In AC applications, a diode connected in parallel to the load is not sufﬁcient.

RC elements should be used here, connected in parallel to the Reed switch.

Please contact our design engineers for advice in order to select a suitable RC element.

C R

Last

Wiring suggestions

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Subject to change · 60.40-e · 0215

Overview of types

DG 063 - Optical differential pressure indicator with

automatic reset

Function:

When the preset differential pressure is reached, the optical

indicator changes from green to red. If the pressure differential

returns to a value below the preset limit, the indicator changes

back to green, i.e. no manual reset of the indicator is required.

DG 064 - Optical differential pressure indicator with

manual reset

Function:

When the preset differential pressure is reached, a red pin

retracts from the hole of the indication.

If the pressure differential returns to a value below the preset

limit, the pin does not disappear automatically.

Due to the ﬁtted resting fuction, a manual reset of the indicator

is required.

DG 060 - Electrical differential pressure switch (make)

Function:

The built-in Reed switch closes when the preset differential

pressure is reached.

DG 061 - Electrical differential pressure switch (break)

Function:

The built-in Reed switch opens when the preset differential

pressure is reached.

DG 062 - Electrical differential pressure switch (change-over)

Function:

When the preset differential pressure is reached, the built-in

Reed switch changes over.

The change-over (CO) switch makes it possible to indicate a

broken wire by means of a suitable electronic circuit, as compa-

red to a make contact (normally open NO) switch.

Option:

For versions with connector plug according to DIN EN 175301-

803 and symbol 6, a transparent socket with 2 built-in LEDs is

available. This socket makes it possible to have an additional

optical indication of the ﬁlter contaminsation.

When the operating voltage is switched on, a green LED lights

up. When the switching pressure is reached, a yellow LED lights

up in addition.

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Selection Chart

Part No.

Optical indicator

Electrical indicator

Response/switching pressure

Type of contact

witching voltage U

Switching current I

Switching power P

Symbol

Weight

Remarks

bar V AC/DC A AC/DC V A/W AC/DC kg

1 2 3 4 5 6 7 8 9 10 11

DG 063-02 • - 2,0 - - - - 1 0,09 automatic reset

DG 063-05 • - 5,0 - - - - 1 0,09 automatic reset

DG 064-02 • - 2,0 - - - - 2 0,09 manual reset

DG 064-05 • - 5,0 - - - - 2 0,09 manual reset

DG 060-31 - • 2,0 make 48/48 0,5/0,5 10/10 3 0,09 AMP Superseal-2P*

DG 060-21 - • 2,0 make 48/48 0,5/0,5 10/10 3 0,09 Deutsch DT04-2P*

DG 060-30 - • 5,0 make 48/48 0,5/0,5 10/10 3 0,09 AMP Superseal-2P*

DG 060-20 - • 5,0 make 48/48 0,5/0,5 10/10 3 0,09 Deutsch DT04-2P*

DG 061-31 - • 2,0 break 48/48 0,5/0,5 10/10 4 0,09 AMP Superseal-2P*

DG 061-21 - • 2,0 break 48/48 0,5/0,5 10/10 4 0,09 Deutsch DT04-2P*

DG 061-30 - • 5,0 break 48/48 0,5/0,5 10/10 4 0,09 AMP Superseal-2P*

DG 061-20 - • 5,0 break 48/48 0,5/0,5 10/10 4 0,09 Deutsch DT04-2P*

DG 062-04 - • 2,0 change-over 48/48 0,5/0,5 10/10 5 0,09 DIN EN 175301-803*

DG 062-05 - • 2,0 change-over 48/48 0,5/0,5 10/10 6 0,09 DIN EN 175301-803*

DG 062-01 - • 5,0 change-over 48/48 0,5/0,5 10/10 5 0,09 DIN EN 175301-803*

DG 062-02 - • 5,0 change-over 48/48 0,5/0,5 10/10 6 0,09 DIN EN 175301-803*

DG 062-31 - • 2,0 change-over 48/48 0,5/0,5 10/10 7 0,09 AMP Superseal-3P*

DG 062-21 - • 2,0 change-over 48/48 0,5/0,5 10/10 8 0,09 Deutsch DT04-3P*

DG 062-41 - • 2,0 change-over 48/48 0,5/0,5 10/10 9 0,09 M12 x 1-4P*

DG 062-30 - • 5,0 change-over 48/48 0,5/0,5 10/10 7 0,09 AMP Superseal-3P*

DG 062-20 - • 5,0 change-over 48/48 0,5/0,5 10/10 8 0,09 Deutsch DT04-3P*

DG 062-40 - • 5,0 change-over 48/48 0,5/0,5 10/10 9 0,09 M12 x 1-4P*

Remarks:

› The response/switching pressure of the clogging indicator must be lower than the cracking pressure of the bypass valve of the

ﬁlter.

› The clogging indicators listed in this chart are standard units. Other designs available on request.

› Reed switches are sensitive of excessively strong currents. Even a short-term overload causes an increased contact resistance or

failure of the switch. By taking the precautions described in paragraph wiring suggestions, premature failure of Reed switches due

to overload is avoided.

*Design of the connector plug - connector socket not included in the scope of delivery.

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Subject to change · 60.40-e · 0215

Dimensions

Measurements

Type A B D E F G H I K AF

DT04 -2P/-3P

 29

36,5 9,7 17,5 M20 x 1,5 13 20 25 55 24

AMP -2P/-3P

 29

36,5 9,7 17,5 M20 x 1,5 13 20 25 50 24

M12 x 1-4P

 29

36,5 9,7 17,5 M20 x 1,5 13 20 25 46 24

DG 063 - - 9,7 17,5 M20 x 1,5 13 20 25 37,5 24

DG 064 - - 9,7 17,5 M20 x 1,5 13 20 25 41,5 24

DIN EN 175301-803

 29

36,5 9,7 17,5 M20 x 1,5 13 20 25 39 24

All for processing necessary

measurements and tolerances are

available on request.

DT04 -2P/-3P

AMP -2P/-3P

M12 x 1-4P

DG 063 (autom. RS)

DG 064 (man. RS) DIN EN 175301-803

Minimum distance from

ferromagnetic parts: 7mm

Symbols

3 4 5 6

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Pos. Designation Part No.

1 O-ring 17,3 x 2,2 N007.0172-4

2 O-ring 14 x 1,78 N007.0142

The functions of the complete ﬁlters as well as the outstanding

features of the ﬁlter elements assured by ARGO-HYTOS can only

be guaranteed if original ARGO-HYTOS spare parts are used.

Quality Assurance

Quality management according to DIN EN ISO 9001

Various quality controls during the production process guarantee the leakfree function and solidity of our products.

Illustrations may sometimes differ from the original. ARGO-HYTOS is not responsible for any unintentional mistake in this speciﬁcation sheet.

Spare Parts