Digital pressure meter ZET 7012-A-VER.3

  • Integrated primary transducer
  • Explosion-proof version
  • RS-485 digital output
  • 4-20 mA output version available
  • 4-digit indicator

From 223 USD

* Minimum order value: from 7 700 USD

Upper measurement range is to be specified in comments to the order

*Delivery term – from 3 weeks


of ZET 7012-A VER.3 digital pressure meter

Metrological specifications
Measured value absolute pressure
Measurements tolerance 0,1%
Upper limit of pressure measuring range 0,16 MPa
Bottom limit of pressure measuring range 160 Pa
Sensitivity threshold (minimum difference between sequentially measured values) 1 Pa
0,1 mmHg
Absolute measurement error (of the upper range limit) 0,1 %
Relative measurement error (of the measured value) 0,1 %
Additional measurement error (caused by temperature fluctuations) 0,1 %/ °10 C
Technical specifications
Data refresh rate 1 Hz
Digital interface
Data transfer interface RS-485
Exchange speed 4800, 9600, 14400, 19200, 38400, 57600, 115200 bit/s
Parity control 0 – no control; 1 – control (parity, ODD)
Exchange protocol Modbus RTU
Analog interface*
Current signal 4-20 mA
Load impedance 0…250 Ohm
Operational specifications
Indicator bright red, 7 sections, 4-digit
Power supply from 9 to 24 V
Consumed power 0,5 W
Reverse polarity protection yes
Operational temperature range from -40 to +100 °C
Operation environment liquids and gases non-aggressive to titanium alloys and stainless steels
Design versions Standard (IP68 protection degree)
Explosion-proof* (explosion protection of 1ExdIIAT6X type, cable length – 4 m)
Pressure overload 1,5×Upper limit of pressure measuring range
Electromagnetic compatibility EMC
IEC 61000-4-2, ESD contact 4 kV; air 8 kV
IEC 61000-4-4, EFT power supply 0,5 kV; signal 0,25 kV
IEC 61000-4-5, Surge 500 V



of ZET 7012-A VER.3 digital pressure meter

Digital pressure meter ZET 7012-A-VER.3 is used for fast and simple absolute pressure measurements and measured values data transfer in digital format via RS-485 or 4-20 mA interface.

ZET 7012-A VER.3 digital pressure meter is intended for integration into various technological processes automated control systems.

Operating principles

of ZET 7012-A VER.3 digital pressure meter

Digital pressure meter ZET 7012-A-VER.3 consists of primary transducer and integrated measuring module.

The primary transducer converts the pressure value into analog signal. The measuring unit digitizes the signal from the converter and transmits the pressure value in a digital form via RS-485 interface by means of Modbus protocol  or via data transfer interface “Current loop” (4-20 mA). The membrane of the primary transducer is made of a silicon plate. The strain resistor circuit (bridge connection) is implemented on the basis of the “silicon on sapphire” technology (SOS). This allows to perform inertia-free dynamic measurements up to 1,000 Hz. In contrast to metal membranes with glued bridge strain resistors, SOS membranes allow to register pressure change at the level of 0.00001 from the upper range limit. Sensitivity of the electronic amplifier is 15 nV reduced to the input.

The pressure meters are attached to the controlled object while the interface modules enabling data transfer are placed inside of electrical cabinets.

ZETLAB electrical cabinet is more compact than similar available analog products. Among ZETSENSOR modules advantages one should mention easy installation and de-installation of modules as well as power and signal transfer indication (which, in its turn, facilitates in-place diagnostics of the measuring system).

To connect the pressure meter to the measuring line it is necessary to put the cables into the pressure meter package, remove upper lid and connect the cables to corresponding contact points. The table below shows contact points marking.

For connection to current output I+, I- and PWR contact points are used.
For connection to RS-485 PWR, D-, D+ and GND contact points are used.

Marking Designation
I- Current –
I+ Current +
PWR +(9…24) V
D- RS-485 line «B» or «DATA -»
D+ RS-485 line «A» or «DATA +»
Connecting pressure sensors 7X12 with indicator to measuring network

Measuring network diagram

of ZET 7012-A VER.3 digital pressure meter

Using digital pressure meters is especially convenient for establishing distributed measuring networks. Unlike normally used centralized measuring networks, there is no need to use “star-type” conection, which allows to reduce overall cable length. Since the data is transmitted in digital format, the are less requirements to data transfer channel, besides, one can use relatively inexpensive cables for the measuring network establishing.

In order to connect the measuring network to ZETLAB and ZETVIEW systems, one can use interface converter ZET 7070 (USB ↔ RS-485) or ZET 7076 (Ethernet ↔ RS-485). Using inner power supply module ZET 7070 one can connect up to 4 digital pressure meters to a single ZET 7070 module (and up to 60 digital pressure meters if external power supply module is used).

ZETLAB software enables connection of up to 1024 pressure meters to a single PC. The measuring networks can also be connected to any system using Modbus protocol via RS-485 interface.

Directive 2011/65/EU (ROHS, ROHS II)


Basic configuration

of ZET 7012-A VER.3 digital pressure meter

Basic configuration of digital family sensors

Digital pressure meter basic configuration includes:

  • Digital pressure meter ZET 7012-A-VER.3;
  • ZET 7002 measuring line coupling unit;
  • set of operational documentation.

Necessary measuring products

supplied upon request

Interface converter ZET 7076 Ethernet Wi-Fi RS-485
ZET 7076 interface converter
Ethernet Connection

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