Model: PT500-551 / 433M wireless pressure transmitter

Imported pressure sensing chip is adopted; The selected patch process has zero point, full-scale compensation and temperature compensation;
Short distance 433M / Lora wireless transmission and reception, transmission distance 100 – 5000 meters (sight distance);
Integrated structure, internal battery power supply / battery detachable and rechargeable;
Diversified acquisition methods (instrument acquisition / PC acquisition / acquisition card / PLC module, etc.);
One to one or many to one acquisition can be realized;
High precision, stable, digital calibration, adjustment and amplification integrated circuit;
The communication protocol collects rs485-rtu / TTL, which can realize low power consumption;
Stainless steel shell, stainless steel process connection, various pressure sealing methods;
It can replace foreign high-voltage products of the same type;
Pt500-551-433m / Lora wireless receiving module:
USB level, industrial wireless serial port transmission module with aluminum alloy shell;
It is based on the 1W high-power wireless data transmission module developed by Semtech's sx1276 / 1278 chip;
Loratm spread spectrum modulation frequency hopping technology is adopted, which has high receiving sensitivity and strong anti-interference performance;
The external integrated PA device makes its communication distance and reception sensitivity far exceed the current FSK and GFSK modulation;
The wireless data is encrypted by aes128, which makes the data transmission more secure and has strong anti-interference;
Open transmission distance up to 8000 meters (low rate / 5W) USB level interface
Operating frequency band: 433 / 470 (1W) MHz, 868 / 915 (500MW) MHz
Sensitivity up to - 139 dBm
Output power: 5W (+ 40dbm) / 2W (+ 36dbm) / 1W (+ 30dBm) / 500MW (+ 27dBm)
Diversified serial port parameter settings
Lora modulation mode
Up to 40 communication channels
Pt500-551 / 433M wireless pressure transmitter is mainly used in:
Short distance wireless water pressure / level monitoring;
Short distance wireless water pressure / level monitoring;;
Remote automatic control system, etc;

Measuring medium: liquid and gas (compatible with product process connecting materials)
Pressure form: gauge pressure and absolute pressure
Range:
0～100MPa； 150 MPa； 200 MPa；
250 MPa； 300 MPa； 350 MPa； 400 MPa；;
450 MPa； 500 MPa；
-0.1～0～0.6～5MPa;
-100KPa～10KPa～40MPa; ±10KPa～±100KPa

Comprehensive accuracy: ± 0.25% FS; ±0.5%FS； ±1%FS
Nonlinearity: ≤ 0.25% FS
Repeatability: ≤ 0.1% FS
Output signal:
433M / rs485-rtu
433M/TTL
433M / rs485-rtu (low power consumption)

Power supply voltage:
Built in battery 12VDC
Built in battery 5VDC
Built in battery 3.7VDC

Receiving module: 433M wireless receiving, 5VDC power supply, power 100MW / 500MW / 2W
Insulation impedance: ≥ 1000 m Ω / 100VDC
Medium temperature: - 20 ~ 80 ℃
Ambient temperature: - 20 ~ 70 ℃
Compensation temperature: 0 ~ 70 ℃
Response time: ≤ 500ms (related to transmission distance, usually set 3S ~ 3600s to collect once)
Overload pressure: 150% FS
Stability: ≤± 0.15% FS / year
Vibration influence: ≤± 0.15% FS / year (mechanical vibration frequency 20Hz ~ 1000Hz)
Failure pressure: 3 times the range (the range is less than 350Mpa); 2 times the range (the range is greater than 400MPa)
Protection grade: IP65
Connecting material: 304 / 316L
Process connection: m20x1 5. G1 / 2, specifications formulated by users

Receiving module

A. Overview:

Pt500-551-433m / Lora wireless receiving module is an industrial wireless serial port transmission module with USB level and aluminum alloy shell. It is based on the 1W high-power wireless data transmission module developed by the sx1276 / 1278 chip of Semtech company. The device adopts Lora TM spread spectrum modulation and frequency hopping technology, with high receiving sensitivity and strong anti-interference performance, In addition, the external integrated PA device makes its communication distance and reception sensitivity far exceed the current FSK and GFSK modulation. The module encrypts the wireless data with aes128, which makes the data transmission safer and has strong anti-interference.

B. Characteristics
The open transmission distance can reach 8000 meters (low rate / 5W)
USB level interface
Operating frequency band: 433 / 470 (1W) MHz
868/915（500mW）MHz
Sensitivity up to - 139 dBm
Output power: 5W (+ 40dbm) / 2W (+ 36dbm) / 1W (+ 30dBm) / 500MW (+ 27dBm)
Diversified serial port parameter settings
Lora modulation mode
Up to 40 communication channels
Operating voltage range: 4.5 ~ 5.5 V
Operating temperature range: - 40 ~ + 85 ° C

C. Performance parameters

Measuring medium: liquid and gas (compatible with product process connecting materials)
Pressure form: gauge pressure and absolute pressure
Range:
0～100MPa； 150 MPa； 200 MPa；
250 MPa； 300 MPa； 350 MPa； 400 MPa；;
450 MPa； 500 MPa；
-0.1～0～0.6～5MPa;
-100KPa～10KPa～40MPa; ±10KPa～±100KPa
Comprehensive accuracy: ± 0.25% FS; ±0.5%FS； ±1%FS
Nonlinearity: ≤ 0.25% FS
Repeatability: ≤ 0.1% FS
Output signal:
433M / rs485-rtu
433M/TTL
433M / rs485-rtu (low power consumption)
Power supply voltage:
Built in battery 12VDC
Built in battery 5VDC
Built in battery 3.7VDC
Receiving module: 433M wireless receiving, 5VDC power supply, power 100MW / 500MW / 2W
Insulation impedance: ≥ 1000 m Ω / 100VDC
Medium temperature: - 20 ~ 80 ℃
Ambient temperature: - 20 ~ 70 ℃
Compensation temperature: 0 ~ 70 ℃
Response time: ≤ 500ms (related to transmission distance, usually set 3S ~ 3600s to collect once)
Overload pressure: 150% FS
Stability: ≤± 0.15% FS / year
Vibration influence: ≤± 0.15% FS / year (mechanical vibration frequency 20Hz ~ 1000Hz)
Failure pressure: 3 times the range (the range is less than 350Mpa); 2 times the range (the range is greater than 400MPa)
Protection grade: IP65
Connecting material: 304 / 316L
Process connection: m20x1 5. G1 / 2, specifications formulated by users