Electronic
pressure measurement
Pressure transmitter with thin film technology
For mobile hydraulic applications
Model MH-1
WIKA data sheet PE 81.21
Applications
■■ Mobile hydraulics
■■ Machine building
■■ General industrial applications
Special features
■■ Measuring ranges from 0 ... 60 to 0 ... 600 bar
■■ Output signals 4 ... 20 mA and DC 1 ... 5 V
■■ Extremely shock and vibration resistant
■■ Ingress protection IP65 to IP69K (steam jet-proof)
Pressure transmitter, model MH-1
Description
Robust design The design matched to mobile applications enables shock
Extreme shock and vibration resistance, resistance to pressure loading up to 100 g and vibration up to 20 g.
spikes (CDS system) and ingress protection greater than
IP68 make the model MH-1 pressure transmitter especially Very good EMC characteristics in accordance with EN 61326
qualified for the harsh operating conditions in mobile hydraulics. ensure reliable operation even under severe EMC conditions. In
Measuring ranges from 0 ... 60 to 0 ... 600 bar cover the addition, there is protection against load dump of up to 200 V.
standard applications in mobile hydraulics completely.
High ingress protection
Proven thin-film sensor technology Even extreme temperature shocks do not affect the operational
The hermetically welded thin-film measuring cell ensures a safety. Especially for mobile applications, these pressure
high long-term leak tightness. The need for additional sealing transmitters offer a wide range of available ingress protections.
materials is dispensed with completely. As well as the M12 x 1 circular connector with a screw-on lid, an
angular connector per DIN EN 175301-803, form C with IP65 is
The thin-film sensor is especially impressive in applications also available.
with high dynamic loads. The thin-film sensor of the MH-1 is For extreme applications, cable versions up to IP69K (steam
made from stainless steel and is manufactured using sputtering jet-proof) with pre-assembled, customer-specific connectors
technology which ensures a high long-term stability. are available.
A special protection to prevent the escape of oil following
damage is offered by the recessing of the security sensor within
the process connection.
WIKA data sheet PE 81.21 ∙ 08/2017 Page 1 of 7
Measuring ranges
Gauge pressure
bar 0 ... 60 0 ... 100 0 ... 160 0 ... 250 0 ... 400 0 ... 600
psi 0 ... 1,000 0 ... 1,500 0 ... 2,000 0 ... 3,000 0 ... 5,000 0 ... 8,000
Other measuring ranges on request.
Overload safety: 2 times
Vacuum tightness: Yes
Output signals
Signal type Signal
Current (2-wire) 4 ... 20 mA
Voltage (3-wire) DC 1 ... 5 V
Other output signals on request.
Load
■■ Current (2-wire): ≤ (power supply - 10 V) / 0.02 A
■■ Voltage (3-wire): > 5 kΩ
Voltage supply
Power supply
■■ Current (2-wire): DC 10 ... 30 V
■■ Voltage (3-wire): DC 10 ... 30 V
Time response
Settling time: ≤ 5 ms
Reference conditions (per IEC 61298-1)
Temperature: 15 ... 25 °C (59 ... 77 °F)
Atmospheric pressure: 860 ... 1,060 mbar (12.5 ... 15.4 psi)
Humidity: 45 ... 75 % r. h.
Power supply: DC 24 V
Mounting position: Calibrated in vertical mounting position with process connection facing downwards.
Accuracy specifications
■■ Non-linearity (per IEC 61298-2): ≤ ±0.4 % of span BFSL
■■ Accuracy ≤ 0.5 % of span BFSL 1)
■■ Long-term stability (per DIN 16086:2006-01): ≤ 0.2 % of span/year
1) Including non-linearity, hysteresis, zero offset and end value deviation (corresponds to measured error per IEC 61298-2).
Page 2 of 7 WIKA data sheet PE 81.21 ∙ 08/2017
Operating conditions
Permissible temperature ranges
■■ Medium: -40 ... +125 °C (-40 ... +257 °F)
■■ Ambient: -30 ... +85 °C (-22 ... +185 °F), option: -40 ... +85 °C (-40 ... +185 °F)
Depending on the choice of sealing on the process connection, the electrical connection or cULus approval, the medium and
ambient temperatures may be limited (for restrictions see “Process connections,
sealings” and “Electrical connection”).
Storage and transport conditions
Storage temperature: -40 ... +85 °C
Climate classes
■■ Storage: 1K4 (per EN 60721-3-1)
■■ Transport: 2K3 (per EN 60721-3-2)
■■ Operation: 4K4H (per EN 60721-3-4, without condensation or icing)
Vibration resistance: 20 g (IEC 60068-2-6)
Shock resistance: 500 g (IEC 60068-2-27)
Process connections
Standard Thread size
DIN 3852-E G¼A
M14 x 1.5
ANSI/ASME B 12.5 ¼ NPT
Others on request.
WIKA data sheet PE 81.21 ∙ 08/2017 Page 3 of 7
Electrical connections
Description Ingress protection
Circular connector M12 x 1, 4-pin IP67
Angular connector DIN 175301-803 C IP65
■■ Wire cross-section max. 0.75 mm2
■■ Cable diameter 4.5 ... 6 mm
Cable outlet (1.5 m, 3 m, 5 m) IP69K
■■ Wire cross-section 3 x 0.75 mm² / AWG 20 with end splices
■■ Cable diameter 5.9 mm (2-wire), 8.4 mm (3-wire)
Other connections on request.
Connection diagrams
Circular connector M12 x 1 (4-pin)
2-wire 3-wire
U+ 1 1
U- 3 3
S+ - 4
Angular connector DIN 175301-803 C
2-wire 3-wire
U+ 1 1
U- 2 2
S+ - 3
Cable outlet
2-wire 3-wire
U+ brown black
U- red black
S+ - black
Electrical protective measures
■■ Short-circuit resistance: S+ vs. U-
■■ Reverse polarity protection: U+ vs. U-
■■ Insulation voltage: DC 500 V
Materials
Wetted parts
Stainless steel
Page 4 of 7 WIKA data sheet PE 81.21 ∙ 08/2017
Approvals
Logo Description Country
EU declaration of conformity European Union
■■ EMC directive
■■ Pressure equipment directive
■■ RoHS directive
EAC Eurasian Economic Community
■■ EMC directive
■■ Pressure equipment directive
GOST Russia
Metrology, measurement technology
KazInMetr Kazakhstan
Metrology, measurement technology
- MTSCHS Kazakhstan
Permission for commissioning
BelGIM Belarus
Metrology, measurement technology
- GPN Belarus
Fire safety certification
UkrSEPRO Ukraine
Metrology, measurement technology
Uzstandard Uzbekistan
Metrology, measurement technology
- CPA China
Metrology, measurement technology
- CRN Canada
Safety (e.g. electr. safety, overpressure, ...)
Manufacturer’s information and certificates
Logo Description
- China RoHS conformity
- MTTF > 100 years
Approvals and certificates, see website
WIKA data sheet PE 81.21 ∙ 08/2017 Page 5 of 7
Dimensions in mm (in)
with angular connector with M12 x 1 circular connector with cable outlet
DIN 175301-803 A
Weight approx. 0.2 kg Weight approx. 0.2 kg Weight approx. 0.2 kg
G ¼ A DIN 3852-E ¼ NPT M14 x 1.5 DIN 3852-E
(overload safety 600 bar) (overload safety 600 bar)
Pressure port ∅ 3.5 mm
For information on tapped holes and welding sockets, see Technical information IN 00.14 at www.wika.com.
Page 6 of 7 WIKA data sheet PE 81.21 ∙ 08/2017
Accessories and spare parts
Mating connector
Description Order number
without cable 2 m (6 ft) cable 5 m (16 ft) cable 2 m (6 ft) cable,
shielded
Angular connector DIN EN 175301-803 C 1439081 11225823 11250194 -
Circular connector M12 x 1 (4-pin)
■■ straight - 11250780 11250259 14056584
■■ angled - 11250798 11250232 -
Sealings for mating connectors
Mating connector Order number
Blue (WIKA) Brown (neutral)
Angular connector DIN EN 175301-803 C 11169479 11437881
Sealings for process connection
Thread size Order number
NBR FKM FPM
G¼A 1537857 1576534 1576534
M14 x 1.5 1537857 1576534 -
Ordering information
Model / Measuring range / Output signal / Process connection / Sealing / Electrical connection / Ambient temperature range /
Accessories and spare parts
© 09/1998 WIKA Alexander Wiegand SE & Co. KG, all rights reserved.
The specifications given in this document represent the state of engineering at the time of publishing.
We reserve the right to make modifications to the specifications and materials.
Page 7 of 7 WIKA data sheet PE 81.21 ∙ 08/2017
08/2017 EN
WIKA Alexander Wiegand SE & Co. KG
Alexander-Wiegand-Straße 30
63911 Klingenberg/Germany
Tel. +49 9372 132-0
Fax +49 9372 132-406
info@wika.de
www.wika.de
