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Electrostatic Sensor

This product DC-W08Z can realize non-contact surface static voltage and electrostatic field monitoring, alarm and other functions. Based on the principle of charge induction, the core detection structure is developed using vibration capacitance technology, without easy-to-wear parts such as motors, and has outstanding advantages such as small size, light weight, low power consumption, high sensitivity, and easy integration. It realizes convenient, fast, and reliable accurate measurement of industrial static voltage, and has significant technical advantages in electrostatic detection such as industrial production and scientific research.


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Product Description

Item	Specification
Model	DC-W08Z
Dimensions	75.5 * 24 * 18 mm
Detection Range	20～150mm adjustable (can be extended according to application requirements)
Measurement Range	±20kV (installation distance 20～150mm, can be customized according to actual application requirements) ±100kV (installation distance 500mm)
Resolution	1V
Accuracy	±(Test Value * 3% + Full Scale * 0.1%)
Data Update Cycle	1S (internal update time < 50ms)
Housing Material	Aluminum alloy housing + surface anodic oxidation
Operating Voltage	DC-12V
Rated Power	0.6W
Operating Humidity	0～99% PH
Operating Temperature	10～55℃
Wiring Method	RJ45 (network port)
Signal Output	RS485 (MODBUS-RTU)
Communication Distance	100M (wired)
Data Update Cycle	1S (internal update < 100ms)
Boot Time to be Tested	1S
Alarm Indicator	LED: Level 1 (Yellow) Level 2 (Orange) Level 3 (Red) Buzzer

Appearance structure dimensions:

Internal structure:

Upper computer software:

RJ interface information:

Installation diagram:

Communication protocol:

Name	Read	Write	Block	(HEX) Address (DEC)	Number	Bits	Transmission Type	Byte Order	Bit Order
Temperature Value	√		Input Register (RO)	1000 (4096)	2	32	float	Big-endian	Big-endian
Humidity Value	√		Input Register (RO)	1002 (4098)	2	32	float	Big-endian	Big-endian
Static Pressure Value	√		Input Register (RO)	1004 (4100)	2	32	float	Big-endian	Big-endian
Sensor Value	√		Input Register (RO)	1006 (4102)	2	32	float	Big-endian	Big-endian
Alarm Status	√		Input Register (RO)	1008 (4104)	1	16	uint16	Big-endian	Big-endian
Name	Read	Write	Block
Zero Point Value	√	√	Holding Register (RW)	1100 (4352)	2	32	float	Big-endian	Big-endian
External Field Sensitivity Coefficient	√	√	Holding Register (RW)	1102 (4354)	2	32	float	Big-endian	Big-endian
External Field Sensitivity Coefficient 2	√	√	Holding Register (RW)	1104 (4356)	2	32	float	Big-endian	Big-endian
Address	√	√	Holding Register (RW)	1106 (4358)	1	16	uint16	Big-endian	Big-endian
Level 1 Alarm Threshold Value	√	√	Holding Register (RW)	1108 (4360)	2	32	float	Big-endian	Big-endian
Level 2 Alarm Threshold Value	√	√	Holding Register (RW)	110A (4362)	2	32	float	Big-endian	Big-endian
Level 3 Alarm Threshold Value	√	√	Holding Register (RW)	110C (4364)	2	32	float	Big-endian	Big-endian
Baud Rate	√	√	Holding Register (RW)	110E (4366)	1	16	uint16	Big-endian	Big-endian
Data Bit	√	√	Holding Register (RW)	110F (4367)	1	16	uint16	Big-endian	Big-endian
Stop Bit	√	√	Holding Register (RW)	1110 (4368)	1	16	uint16	Big-endian	Big-endian
Parity Bit	√	√	Holding Register (RW)	1111 (4369)	1	16	uint16	Big-endian	Big-endian
Smoothing Parameter Q	√	√	Holding Register (RW)	1114 (4372)	2	32	float	Big-endian	Big-endian
Timing Parameter T	√	√	Holding Register (RW)	1116 (4374)	1	16	uint16	Big-endian	Big-endian
Boot Voltage	√	√	Holding Register (RW)	1117 (4375)	2	32	float	Big-endian	Big-endian
Threshold Change Rate	√	√	Holding Register (RW)	1119 (4377)	2	32	float	Big-endian	Big-endian
Mode	√	√	Holding Register (RW)	111B (4379)	1	16	uint16	Big-endian	Big-endian
Alarm Status: 0-Normal, 1-Level 1 Alarm, 2-Level 2 Alarm, 3-Level 3 Alarm
Address: 1-15
Application Formula: Static Pressure = (Sensor Value - Zero Point Value) / External Field Sensitivity Coefficient (Current Static Pressure Value / Calibrated Static Pressure Value) = (New External Field Sensitivity Coefficient / Current Coefficient)
Baud Rate: 0: 115200 1: 57600 2: 38400 3: 28800 4: 19200 5: 14400 6: 9600 7: 4800 8: 2400 9: 1200 10: 600 11: 300
Data Bit: 0: 8
Stop Bit: 0: 1
Parity Bit: 0: None 1: Odd 2: Even 3: Mark 4: Space
Smoothing Parameter Q: Default 10, the smaller the value, the smoother the response, but slower
Timing Parameter T: Default 012C = 300s, if the value does not change significantly within continuous T time, it indicates not in production status, and auto zeroing is performed
Boot Voltage: Default 0.02 kV, indicating normal zero point ±20V, if not in production status, measurement values within this range do not perform automatic zeroing, used to adjust dead zone
Threshold Change Rate: Default 0.007KV, indicating every two sets of data, if the data changes by more than 7V within 50ms, it indicates production status, exit clear zero status
Mode Selection: 0000-Normal mode, does not perform smoothing, zeroing operations on the data 0001-Smoothing mode, performs smoothing processing on the data, reducing jump noise 0002-Automatic zeroing mode, performs automatic zeroing on the data, determines non-production status by automatic zeroing

Note: Regarding the issue of distance affecting accuracy

Non contact electrostatic sensors measure static voltage through electric field induction. There is a conversion relationship between measuring static voltage and electric field. The electric field generated by the product is radiating, and the farther away the electric field value, the smaller the electric field value. The electric field value varies at different distances. To convert to the same static voltage value at different distances, different parameters need to be corresponding. So, in order to ensure the consistency of measurement values during installation, it is generally installed at a fixed distance and with fixed parameters.