T 9500 ENMedia
Liquid Level, Differential Pressure and Flow Meters

Analog and Digital lndicating Units and Transmitters for Liquid Level Measurement
Differential Pressure Measurement · Flow Measurement

SAMSON AKTIENGESELLSCHAFT · Weismüllerstraße 3 · 60314 Frankfurt am Main, Germany
Phone: +49 69 4009-0 · Fax: +49 69 4009-1507 · samson@samson.de · www.samson.de

Edition February 2019

Contents
1
1.1
1.2
1.3
1.4

Media Series · Liquid Level, Differential Pressure and Flow Meters.......................................................................... 2General............................................................................................................................................................... 2Accessories.......................................................................................................................................................... 2Media series ∙ Overview........................................................................................................................................ 3Flow rate measurement according to the differential pressure method........................................................................ 32

Media 5 and Media 05 Differential Pressure and Flow Meters................................................................................ 43

Media 7 Differential Pressure Meter...................................................................................................................... 54SAM Connect Gateway......................................................................................................................................... 86

SAM TANK MANAGEMENT................................................................................................................................ 105

TROVIS-VIEW software....................................................................................................................................... 107
7.1
7.2

Commonly used units and terms......................................................................................................................... 11Conversion table for units of pressure................................................................................................................... 11Terms explained.................................................................................................................................................. 111 Media Series · Liquid Level, Differential Pressure and Flow Meters
1.1GeneralMedia devices are used to measure and indicate differential
pressure as well as derived measured variables for gases andliquids.
Fields of application include stationary or truck-mounted pressure vessels.
The devices mainly consist of a dp-cell and an indicating unit.
The pressure drop measured in liquids, vapors and gases
serves as basis for various applications.

1.2

Accessories

SAMSON offers accessories specially for the Media series:––––––––––––––––

Vent screws
Mounting material for 2" pipe or wall mounting
Screw fitting/cap kits
Retrofit limit contacts for Media 5Isolating switch amplifier
Type 5024-1 Power Supply and Indicator Unit
Pressure sensor...

See Data Sheet u T 9555 for more details.

The benefits of Media devices include:•• Measuring spans from 0 to 3600 mbar•• Compact, easy-to-service devices with particularly low
overall weight•• Indicating unit, with at least a degree of protection IP 54,
suitable for field mounting or panel mounting•• Optional additional functions, such as limit switch, current
output, analog output/input, GSM module etc., to adapt
the devices to specific requirements
An optional valve block is available, which contains threevalves. The valve block is bolted onto the bottom of the dpcell. It offers the following advantages:•• Mounting of an operating pressure gauge•• The connected process lines can be bypassed. This allows
a zero calibration to be performed regardless of the current filling level of the tank.

2T 9500 EN

1.3

Media series ∙ Overview

DeviceMedia 05

Media 5Media 7

Liquid level measurement•••

Differential pressure measurement•••

Flow rate measurement••

With inductive limit contact••

With electric transmitter––Remote data transmission––– 1)•Pressure rating

PN 50

PN 50

PN 60

Measuring spans

40 to 3600 mbar

40 to 3600 mbar

0 to 3600 mbar

Indicator

Analog, Ø100 mmAnalog, Ø160 mm

4” backlit graphical display

CW617N (brass) or CrNi steel

CW617N (brass) or CrNi steel

Brass CW617N-H070(according to DIN EN 12420)–40 to +80 °C–40 to +80 °C–40 to +80 °C

T 9520T 9519T 9510dp-cell material
Permissible ambient temperature range
Details in Data Sheet

1.4

Flow rate measurement according to the differentialpressure method

In combination with a differential pressure meter from theMedia series, the differential pressure method is preferably
used for continuous flow rate measurement of liquids, gases
and vapors. It has the advantage that there are no moving
parts in the process medium which could affect the flow rate.
When the process medium flows through a pipe narrowed
down by the orifice plate assembly, the flow rate increases at
the restriction. The created differential pressure is used tomeasure the flow rate.
SAMSON orifice plate assembly: Type 5090 Orifice Flangewith standard orifice plate and annular chamberTechnical data · Type 5090
Type 5090 Orifice Flange
Valve size

DN 32 to 500 (NPS 1¼ to 20)

Pressure rating

PN 6, 10, 16, 25, 40 (Class 150 to300)

Details in Data Sheet

T 9550Materials · Type 5090
Standard orifice plate1.4404

Annular Max. 300 °C
chamber Max. 400 °C

1.0566/SA 516-70
1.4404/316L, 1.5415

Pipe
Differential pressureconnections
Gasket

Chromated steel or 1.4404/316L
Fiber gasket (max. 200 °C)
Graphite on metal core (max. 450 °C)

Tip
Questionnaire u T 9500-9 is available to specify the datarequired to size the orifice plate assembly. SAMSON uses thespecified data to precisely size the orifice plate assembly.

Fig. 1: Type 5090 Orifice Flange

T 9500 EN

3

2 Media 5 and Media 05 Differential Pressure
and Flow Meters
The differential pressure cell contains a measuring diaphragm
which is designed for measuring spans up to max.
3600 mbar.
The differential pressure ∆p = p1 – p2 creates a force at themeasuring diaphragm, which is opposed by the range
springs. The deflection, which is proportional to the differential pressure, is transferred by the adjustable coupling member
and pointer mechanism to the pointer. In the version with limit
contacts, the metal tags move in the assigned proximity
switches A1 and A2 depending on the pointer’s movement.
When the metal tag enters the inductive field of the associatedproximity switch, it assumes a high resistance (contact open).
When the metal tag leaves the inductive field, it assumes alow resistance (contact closed). This function is similar to thatof a mechanical-type switching contact. The limit signals are
suitable for operating a downstream switching amplifier (transistor relay).

Indicating unit withanalog indicator

A1

A2

Differential
pressure cellSpecial features•• Gases or liquids

Valve block•• Measuring and indicating the differential pressure andmeasured variables derived from it•• Differential pressure cell with brass housing PN 50 andECO measuring diaphragm•• Measuring spans from 0 to 40 through 0 to 3600 mbar•• Directly attachable valve block with test connection (accessories)

(+)
p1

(–)
p2

Fig. 2: Design and principle of operation of Media 05 andMedia 5•• Limit switch with inductive alarm contacts
Technical data (excerpt)
Nominal pressure

PN 50
Overloadable on one side up to50 bar

Measuring spans

40 to 3600 mbar

Characteristic

Reading linear to the differential
pressure, selectable scales

Perm. ambient temperature–40 to +80 °C

Degree of protection

IP 54

Media 5
Limit switch

Max. 3 alarm contacts with LEDs

Proximity switch

SJ3,5N-LED

Media 05

Media 05

Limit switch

Max. 2 alarm contacts

Proximity switch

SJ2-SN

Details for Media 5

Data Sheet T 9519

Details for Media 05

Data Sheet T 9520

Media 5Fig. 3: Media 05 and Media 5 with valve block, pressure gauge
and screw fitting

4T 9500 EN3 Media 7 Differential Pressure Meter
The Media 7 device is a microprocessor-controlled transmitterwith dp cell for measuring, indicating and transmitting thedifferential pressure, pressure or measured variables derived
from them in stationary pressure vessels and in transportation
vehicles. The device is suitable for cryogenic gases, liquids,gases and vapors.

Two-wire version
65#The device mainly consists of a dp cell (1), housing with transmitter and a display (6).

724

The differential pressure ∆p = p1 – p2 is converted into anelectric signal in the dp cell by a sensor and processed in themicrocontroller (2) which controls the display and D/A converter of the two-wire version.

83µC

EEPROM

1Four capacitive keys (4) are used to operate the differential
pressure meter and allow the user to navigate within the menu
on the display.

#

#PΔP

p2– p1+
12
3
4
5
678

dp cell
Microcontroller
Data memory
Operating keys
D/A converter
Display
Serial interface
IA = 4 to 20 mA

24 V version
65=3µC

Fig. 4: Media 7 with valve block, pressure gauge and screw fitting

GSM
PN 60Measuring spans

0 to 3600 mbar

Characteristic

Differential pressure proportional
to the tank geometry

Perm. ambient temperature–40 to +80 °C

Degree of protection

IP 67

Display

LCD 128 x 64 (90 x 40 mm)

Two-wire version
Output4 to 20 mA

24 V version
Input voltage
Output voltage

24 to 36 V DC
12 V DC

Type of protection

ATEX/IECEx: Ex ia IIB T4 Gb

Details

Data Sheet T 9510

EEPROM

9Technical data (excerpt)
Nominal pressure872

4=1##PΔPp2– p1+123456789

dp cell
Microcontroller
Data memory
Operating keys
24 V power supply unit
Display
Serial interface
UB = 12 to 36 V
GSM module

Fig. 5: Design and principle of operation of Media 7T 9500 EN5

A remote data transmission using the optional GSM module(9) is possible in the 24 V version. Connection to the SAM
TANK MANAGEMENT web interface is established over amobile network.
Measurement tasks
The differential pressure of liquids, vapors and gases aremeasured by the integrated dp cell in the Media 7 device. The
measured differential pressure is used for various possible applications.
Differential pressure measurement
Two absolute pressures p1 and p2 are compared for thedifferential pressure measurement. This way, for example thefilters can be monitored by measuring the upstream anddownstream pressures at the filter.
Liquid level measurement
The tank content (function of hydrostatic pressure, tankgeometry and liquid density of the stored gas) is displayed
proportionally and the operating pressure is indicated in theselected unit on the display.
Power supply unit with standby power supply (SPS)
The power supply units include a battery compartment for a
1.5 V battery 1) which provides standby power supply upon
power failure. The interchangeable power supply boards allow the supply of 4 to 20 mA, 24 to 36 V (DC), or 85 to230 V 2) (AC) to be simply adapted to the local conditions.

–– AO: Analog output
The Analog output option module issues an internal measuring signal (4 to 20 mA) representing the tank pressureor, depending on the operating mode, the filling level ordifferential pressure. The analog output parameters can beconfigured.
–– AI: Analog input
The AI: Analog input option module accepts signals fromfilling level or pressure sensors of external equipment with
their own power supply. This module works passively andhas galvanically isolated inputs.
–– AIA: Analog input active
The AIA: Analog input active option module accepts signals from filling level or pressure sensors of externalequipment. This module works actively and has a 12 V
output to power external equipment that do not have theirown power supply.
–– GSM module
A GSM module is available for the 24 V version of theMedia 7 device. The GSM module establishes connection
to the SAM TANK MANAGEMENT web interface over amobile network. It ensures a secure data exchange, polling of states as well as monitoring and operation of theMedia 7 (see Fig. 6).

Optional additional functions
The modular design of the Media 7 device allows it to beadapted to specific requirements. Additional functions areavailable through the use of option modules. A GSM moduleis also available for the 24 V version of the Media 7 device.

The battery is not included in the standard scope of delivery.
In preparation

1)
2)_SAM TANKMANAGEMENT

WWW

Ar, N2,O2, CO2+Fig. 6: Media 7 · Remote data transmission for connection to SAM TANK MANAGEMENT web portal

6T 9500 EN

Liquid level measurement with non-condensing liquids

Flow rate measurement with an orifice plate
Media 05/5Tank_Media 05/5/7__+++

Level measurement with cryogenic gases

Measurements on open vessels with the meter located in a lowposition

Media 7Cryogenictank_Ar, N2,Ar, N2,O
O2,, COCO222

SAM TANKMANAGEMENTWWWhMedia 05/5/7YHK+–+HhK

Measuring range
Measured height
Compensation heightFig. 7: Media series · Sample applications

T 9500 EN

7

4 SAM Connect Gateway
Gateway for connection to SAM TANK MANAGEMENT
The modular SAM Connect Gateway allows the input of signals (4 to 20 mA), for example issued by external transmitters. For this purpose, four slots exist in the device for option
modules that can optionally be used for analog input and/oranalog input active option modules.
Furthermore, the integrated GSM module allows remote datatransmission and connection to the SAM TANK MANAGEMENT web portal.
Special features•• Modular design: easy to install or exchange optional
additional functions by inserting option modules (four slotsin the device)•• Integrated GSM module for remote data transmission

Fig. 8: SAM Connect Gateway•• Modular power supply unit with standby power supply(SPS)

5•• 4” backlit graphical display

4=•• Configuration and programming using the TROVIS-VIEWsoftware

6•• Capacitive keys facilitate operation

1

3•• Start-up wizard
Design and principle of operation
The modular SAM Connect Gateway allows the input ofsignals (4 to 20 mA), for example issued by externaltransmitters. For this purpose, four slots exist in the device tohold option modules that can optionally be used for the AI(analog input) and/or AIA (analog input active) option
modules.
Furthermore, the integrated GSM module allows remote datatransmission and connection to the SAM TANK MANAGEMENT web portal.
Power supply unit with standby power supply (SPS)
The power supply unit includes a battery compartment for a
1.5 V battery which provides standby power supply upon
power failure.
Application

7=82µCEEPROM

6789

Serial interface
UB = 24 to 36 V
GSM moduleOption module (up to 4)

9GSM

12345

Microcontroller
Data memory
Operating keys
24 V power supply unit
Display

Fig. 9: Block diagram of SAM Connect Gateway

The SAM Connect Gateway can accept up to four 4 to 20 mA
signals and transfer the data over the integrated GSM module. As a result, transmitters installed in a plant (e.g. Media 5,Media 6 and/or other transmitters by other manufacturers)
can be connected to the SAM TANK MANAGEMENT web interface. This allows the filling levels of up to four tanks(Fig. 10, top) or the filling level and pressure of two tanks(Fig. 10, bottom) to be logged and managed on the SAM
TANK MANAGEMENT interface.

8T 9500 EN

Example 1: filling levels of four tanks are transferred to the gateway.

Media 6Media 5Media 6

SAM TANKMANAGEMENTMedia 5WWW

Example 2: filling levels and absolute pressures of two tanks are transferred to the gateway.
Media 6Media 6

SAM TANKMANAGEMENT

WWWFig. 10: Sample applications of the SAM Connect Gateway

T 9500 EN

9

5 TROVIS-VIEW software
6 SAM TANK MANAGEMENTSAM TANK MANAGEMENT is a web-based application specifically developed for monitoring the filling levels of liquids,
gases and vapors stored in stationary or truck-mounted pressure vessels.

The Media 7 device and the SAM Connect Gateway can beconfigured with SAMSON's TROVIS-VIEW Software (version 4). For this purpose, the device has a serial interface(SSP) to allow the USB port of a computer to be connected toit using an adapter cable (order. no. 1400-9740).

Any smart mobile device can be used to access SAM TANKMANAGEMENT.

The TROVIS-VIEW software enables the user to easily configure the connected device as well as view process parameters
online.

The Media 7 Differential Pressure Meter and the SAM Connect
gateway are suitable for wireless connection to SAM TANKMANAGEMENT. This ensures safe data exchange all acrossthe world, polling of states, as well as monitoring and operation of the Media devices.

Note
TROVIS-VIEW can be downloaded free of charge from ourwebsite at www.samson.de > Service & Support > Downloads> TROVIS-VIEW.

Additionally, the Media 7 Differential Pressure Meter and theSAM Connect gateway function as a hub, which can connect
up to four Media devices to SAM TANK MANAGEMENT andas a result, monitor several tank farms at the same time.
Special features•• Real-time monitoring of all connected devices•• Immediate notification in the event of device malfunctions
by plain-text message with device status information•• Configuration of Media differential pressure meters overthe Internet•• Unrestricted access to the medium database saved in theMedia 7 meter•• Around-the-clock availability•• Universal interfaces and data exchange using MQTT•• Monitoring of the tank (e.g. maximum filling, pressures,vacuum insulation etc.)
Further information and a demo account available atu www.samson.de10T 9500 EN7 Commonly used units and terms
7.1

Conversion table for units of pressure

The SI unit of pressure is the Pascal (abbreviation Pa):
1 Pa = 1 N/m² = 1 kg/(m · s²)
The table below shows the factors used to convert units still commonly used:
UnitbarPabar–

1 · 10

14.5

750

10.2

Pa

1 · 10 –5–

0.15 · 10 –3

7.5 · 10 –3

0.1 · 10 –3

psi

0.07

6.9 · 10 ³–

51.7

0.7

133.3

19.3 · 10–

14 · 10 –3

9.8 · 10 3

1.4

73.6

–

Torr (= 1 mmHg)
mH2O

7.2

1.33 · 10–30.1psi
5Torr (= 1 mmHg)–3mH2OTerms explained

The following terms (often used in connection with the Mediaseries) are briefly explained.
Absolute pressure

Measuring range

The absolute pressure pabs is the pressure referenced against aperfect vacuum.

The range between lower range and upper range values.

Calibration

The difference between the lower range and the upper range
valuesAdjust a measuring instrument in such a way that the error
between the output variable and the set point remains within
the error tolerance.
Differential pressure
Difference between two pressure p1 and p2:(Δp = p1 – p2)
Differential pressure across the restriction Δp
The difference between the high pressure (+) and low pressure(–) for flow rate or differential pressure measurement.
Error tolerance
Limits within which the measured error of the output variablelies.

Measuring span

Nominal pressure
Greatest operating pressure (static pressure), which may be
applied to both sides of the measuring chamber of the transmitter at the same time.
Operating state
The state of the process medium at the point of measurement(tag) during operation.
Orifice flange (orifice plate assembly)
A restriction which creates a differential pressure of the process medium in the pipeline to measure the flow rate.
Point of measurement

Flow rate

The point in a control loop at which a variable is measured.

The medium flowing through a cross-section is measured intime (e.g. flow rate in m³/h; mass flow in kg/h).

Process medium

Gauge pressure
Difference pe between absolute pressure pabs and the prevailing atmospheric pressure pamb:pe = pabs – pambInternal state variable

The medium whose flow rate, pressure or differential pressure
is to be measured.
Upper range value
The highest value of the input variable at which the output
variable has its final value.

Those physical variables (pressure, temperature, humidity,composition), which determine the state of the process medium.
Lower range value
The lowest value of the input variable at which the output variable has its initial value.

T 9500 EN

11

T 9500 EN

2019-03-14 · English

Specifications subject to change without notice