Product description of strain type pressure transmitter:

无线压力变送器 PT500-550/433M

型号：PT500-550/433M无线压力变送器

采用进口感压芯片；选进的贴片工艺，具有零点、满量程补偿、温度补偿；
短距离433M/LORA无线发射接收，传输距离100–5000米（视距）；
分体结构，外部电流或电源供电；
采集方式多样化（仪表采集/PC采集/采集卡/PLC模块等）；
可实现一对一或多对一采集；
高精度、稳定、数字标定调节、放大集成电路；
通讯协议采集RS485-RTU/TTL，可实现低功耗；
不锈钢外壳，不锈钢过程连接,多种压力密封方式；
可替代国外同类型高压产品；
PT500-550-433M/LoRa无线接收模组:
USB 电平，铝合金外壳的工业级无线串口传输模块；
它基于 Semtech 公司的 SX1276/1278 芯片研发的 1Ｗ大功率无线数传模块；
采用了LoRa TM 扩频调制跳频技术高效的接收灵敏度和超强的抗干扰性能；
外部集成 PA 器件使其通信距离，接收灵敏度都远超现在的 FSK、GFSK 调制；
对无线数据进行了 AES128 加密处理，使数据传输 更加安全，具有超强的抗干扰性；
空旷传输距离可达 8000 米(低速率/5W）USB 电平接口
工作频段：433/470（1W）MHz  868/915（500mW）MHz

灵敏度高达 -139 dBm
输出功率：5W（+40dBm）/ 2W（+36dBm）/ 1W（+30dBm）/ 500mW（+27dBm）
串口参数设置多样化
LORA 调制模式
通讯频道多达 40 个

PT500-550/433M 无线压力变送器主要应用：
短距离无线水压/水位监控；
短距离无线水压/水位监控；；
远程自动化控制系统等；

Model: pt500-550 / 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);
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;

Specification parameter

PT500-550/433M wireless pressure transmitter

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:
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

Ordering considerations Precautions for ordering pt500-550 / 433M products

1. Product range selection:
In order to achieve the best effect of product accuracy, service life, stability and other functions, the range of the product is calculated according to the following formula:
Range = x (1.2-1.5) times the maximum pressure of the system;
The actual measuring pressure range of the product should be 15% - 80% of the measuring range;

2. Product power supply and output:
The selection of power supply range is determined according to the output specifications of the product:
Conventional rs485-rtu output, DC 12-30vdc power supply;
TTL output, DC 3.3-5.0vdc
Low power consumption rs485-rtu output, DC 3.1-6.1vdc;
When ordering products, please understand the communication protocol first;

3. Users need to understand the characteristics of the measuring medium of the product:
Medium specification, medium temperature, medium purity (whether it contains impurities or particles, etc.);

4. Users should understand the installation environment and installation method of the product:
Indoor or outdoor installation;
Ambient temperature;
Required sealing grade;
Vibration range of equipment;
Pressure seal mode: taper seal, end face seal, arc seal and spherical seal;
Whether the installation space meets the overall dimension of the product;

Common problem

Proposal