Pressure Transponder / Data Logger — 21D RFID
Спецификация 21D RFID
Available on request
Delivery across Russia
Order phone: +7(800)777-18-50
Description
The devices of this series are extremely reliable proven industrial pressure transducers, complemented by RFID (radio frequency identification) wireless transmission technology.
The piezoresistive pressure transducers of the D series use KELLER's "chip-in-oil" technology. The hermetically sealed stainless steel housing, welded by laser welding, is filled with oil and contains inside a pressure sensor and energy-efficient compensating electronics using the I2C interface.
21 D RFID Series
Passive RFID pressure transponders
All parts of the RFID transponder, including the antenna, are located in the sensor's plastic cap. The scanner supplies the sensor with enough energy to transmit the current pressure value.
21 DC RFID Series
RFID data loggers
Pressure transponders with an additional built-in data recording function. The built-in battery allows measurements and recording of results. Transmission of stored data is carried out via a wireless RFID interface.
Features
- Extremely resistant to environmental influences
- Extremely compact stainless steel housing, also available in Hastelloy C-276 version
- High accuracy, exceptional long-term stability, no hysteresis
- Temperature measurement
- Pressure ranges from 0...3 to 0...1000 bar
- Freely assignable measurement point name (8 alphanumeric characters)
RFID pressure transponders and data loggers are wireless measuring devices. The built-in antenna is placed in a plastic cap at the top of the device. The scanner (receiver) transmits enough energy to the sensor for data transmission.
The pressure sensor, which performs accurate measurements, is placed in a fully sealed stainless steel cell filled with oil for pressure transmission. The measuring cell is located behind the hexagonal part of the sensor, where the temperature sensor is also located. This means that temperature measurement is not performed directly in the medium but at the point where the readings may be influenced by ambient temperature effects.
The pressure transducer itself, including the sensitive element, electronic components, and stainless steel housing, is a KELLER product. It is also equipped with a black plastic part containing RFID components manufactured by microsensys. Microsensys also supplies the reading device and PC software.
Pressure ranges can be any within the limit between 0…3 and 0…1000 bar. Sensors with lower ranges and other housing shapes can be supplied under certain conditions.
KELLER offers various microsensys reading devices: a small, pen-shaped portable device with a USB port, a device with M30 thread and USB or RS232 port for system engineering, and a standalone indicator (POCKETwork) in the form of a credit card 1 cm wide for field use.
- Specifications
- Overall Drawing
- Applications
|
Specification |
Value |
|
Pressure range* |
PA: from 0…3 bar to 0…1000 bar |
|
Interface |
RFID 13.56 MHz / ISO 14443 |
|
Data transfer rate |
106 kb/s |
|
Basic error |
max. 0.15% FSO |
|
Operating temperature |
-40…110°C |
|
Connection |
G1/4” male or others |
|
Material |
Stainless steel AISI 316L (DIN 1.4404 / 1.4435) |
|
Overloads |
x2 measurement range, max 1200 bar |
|
Power supply (21 DC RFID) |
Built-in lithium-thionyl chloride (LTC) battery |
|
Battery life at 25 °C (21 DC RFID) |
On average 4…5 years with continuous operation and 1 measurement per minute. With longer measurement intervals – on average at least 10 years. Self-discharge rate – about 1% |
|
Memory (21 DC RFID) |
EEPROM |
|
Data logger (21 DC RFID) |
Recording interval: can be set with second accuracy from 10 s to 59 s; can be set with minute accuracy from 1 min to 4:15 (h:mm) |
* - Version for relative pressure (PR: zero at atmospheric pressure) and smaller measurement ranges available on request
PAA – is an absolute pressure transducer.
PA – is a gauge pressure transducer (zero at 1 bar abs.). It is suitable for use where atmospheric pressure changes can be neglected (for ranges above 10 bar) or where a hermetic sensor is required.
|
Measurement ranges, FSO |
Basic error |
Total error |
Total error |
|
0…1000 bar |
Max. ±0.15% FSO |
Max. ±0.5% FSO |
Max. ±0.7% FSO |
