HOF Series Review
Specialized Review of Hogller Pressure Transmitter - HOF series
Hogller pressure transmitter / HOF series, is among flush diaphragm pressure transmitters with a robust and compact design, which is manufactured in Germany. It covers a wide range of different applications with a high level of accuracy. Diaphragm of these series is made of stainless steel 304. It is compatible with many standard fluids which are used in many industries and applications specially food and beverage industry, hydraulic, pneumatic, environment engineering, process technology, semiconductor technology, and car engineering.
As a whole, HOF is used for measuring of pressure and level of crystalline,
Viscous and Perishable media.
Design
Body
HOF series body is made of robust, high quality stainless steel 304, which brings stability and high resistance for these series.
Information like part number, pressure measurement range, output, power supply, CE certification and exclusive serial number of each sensor, is carven on the body of these series.
Electrical connection
At the upper part of HOF pressure transmitters, there are four pins. Electrical connection of these series is DIN EN 175301-803 C (DIN 43650 C). This kind of connection adds IP65 protection standard to other features of HOF series.
Process Connection
At the lower part of the sensor, there stands a flush diaphragm thread pressure port to connect to the process. Totally, Hogller has considered two mechanical connections of G 1" and G 1/2" for HOF series. Other kinds of mechanical connection are also available in case of customization.
Process Connection: G 1/2"
Process Connection: G 1"
In both kinds of the connection, in order to have a better sealing of the connecting part to the process, one sealing washer (O-ring) FKM designed in line with DIN 3869, having high chemical and thermal resistance, is used.
Interior Design
Reference Pressure
Reference pressure in HOF series is Gauge (Relative). It is important to mention that this series are Vented Gauge. That means a vent path behind the sensor diaphragm has been considered, in order to exchange the atmospheric pressure. Thus, environmental changes (changes in atmospheric pressure) have no impact on the sensor’s output at zero point (without any pressure applied).
Sensing Element
HOF sensing elements have used Piezoresistive technology. That brings excellent accuracy and long term stability for these series.
Performance
Nominal Range
HOF series are available in various pressure ranges from [0 … 100] mbar to [0 … 100] bar. These series are resistant to overpressure up to three times more than the nominal pressure. They are also resistant to burst pressure up to four times more than the nominal pressure.
Pressure Range: [0 … 100] bar
Overpressure: 3x
Burst Pressure: 4x
Output
HOF series are available only with current output (4 - 20 mA). Other different outputs including 0 – 5 VDC, 0 – 10 VDC, 0.5 – 4.5 VDC Ratiometric and I²C are optionally ready to deliver.
Accuracy
Accuracy in HOF series is equal to 0.35 % FS in room temperature (RT) and that includes Non-Linearity, Non-Repeatability, Hysteresis, Zero and Final Offset in accordance with IEC 61298-2.
Temperature
In HOF series different permissible temperature conditions are defined for using the sensor, including:
Media Temperature: [-20 … +100] °C
Permissible temperature range of fluid related to sensor.
Ambient Temperature: [-20 … +80] °C
Permissible temperature range of installation area of sensor.
Storage Temperature: [-20 … +100] °C
Temperature range of sensor’s maintenance (being turned off)
Compensated Temperature: [-20 … +80] °C
Compensator temperature range in which sensors have the best function
Wiring
Guarantee and authentication of goods
Hogller has considered exclusive serial numbers for all pressure sensors which are carved on the body, package, and guarantee cards of the sensors. All sensors have one-year warranty depending on the conditions mentioned in the guarantee card. In order to check and make sure of authenticity of the good purchased this link can be used.
Overview
Totally, Hogller has considered affordable prices as well as ideal function in design and manufacture of HOF series. All HOF pressure transmitters, are tested separately regarding temperature and pressure according to DIN EN ISO 9001-2008. In order to have electrical compensation and regulation, these pressure transmitters are considered with a very low Total Error and a perfect long term stability. Measured data is recorded and processed accurately as well.
High accuracy, very short response time, wide pressure range, excellent resistance to shock and vibration, and high electromagnetic compatibility, have enabled these series to meet pressure measurement needs accurately, reliably and ideally in different industries and harsh industrial environments.
