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); Split structure, external current or power supply; 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;
Pt500-550-433m / 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
Pt500-550 / 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;
Power supply voltage: external power supply 12 / 24VDC (9 ~ 30VDC) External power 5VDC (customized) Supporting battery: 12VDC (or rechargeable lithium battery)
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