LS501 Transmittance Digital Probe
Online detection of transmittance/optical density, data signal transmission, easy integration
Independent digital probe design ensures high measurement accuracy and stable test data
Dual RS485 communication interfaces/MODBUS protocol, compatible with PLC, PC, HMI, etc.
Aviation connector design supports expandability for multi-probe connections
The LS501 Transmittance Digital Probe is an intelligent sensor designed to measure the transmittance or optical density of transparent materials. It is suitable for real-time monitoring in various industrial scenarios. Equipped with dual RS485 interfaces and MODBUS protocol, it seamlessly integrates with PLCs, HMIs, and PCs for real-time data acquisition. Applications include online production monitoring, quality inspection for glass, window films, and liquid transmittance analysis.
The probe measures transmittance by comparing incident light intensity with transmitted light intensity through the tested material, calculated as a percentage ratio.
Product Parameters
| Parameter | Value |
|---|---|
| Measurement Wavelength | 380nm-760nm, 850nm IR, 530nm green light (selectable) |
| Measurement Spot | 5mm |
| Transmittance Accuracy | ±1% (for uniform colorless materials) |
| Transmittance Resolution | 0.005% |
| Optical Density Range | 0.00 OD --- 6.00 OD |
| Optical Density Resolution | 0.01 (0.00–3.00 OD)0.05 (3.00–5.00 OD)0.15 (5.00–6.00 OD) |
| Slot Width | <40mm |
| Operating Temperature | -10℃ ～ 60℃ |
| Storage Temperature | -20℃ ～ 70℃ |
| Humidity | <85% (non-condensing) |
| Data Refresh Rate | 300ms (normal mode)/100ms (fast mode) |
| Communication | Dual RS485 |
| Protocol | MODBUS |
| Power Supply | 7.5V–15V DC |
| Current | 50mA |
| Power Consumption | 375mW |
| Light Source Probe | 50*35*46.3(mm) |
| Receiver Probe | 50*35*25.5(mm) |
| Cable Length | Customizable |
Features
Stable Digital Probe Design
Integrated digital signal processing ensures interference-free, high-precision transmittance/OD output.
RS485/MODBUS Compatibility
Dual RS485 interfaces with MODBUS protocol enable seamless automation integration with PLCs, HMIs, and PCs.
Compact & Easy Installation
Split design (light source + detector) with mounting brackets; simplified 6-wire connection.
Metrology Certification
Accuracy certified by national metrology institutes.
Modular Expandability
Aviation connectors allow multi-probe expansion. (Note: Default configuration excludes expansion ports; contact support for customization.)
Optional Accessories
(Note: Debugging HMI, RS232 converter, USB converter are not standard and can be purchased as needed.)
1. Debugging HMI
Can be used to view probe data during setup, and to set probe address and baud rate.
2. RS232/RS485 Converter
Used for communication protocol debugging.
3. USB Converter
For connecting RS485 to USB for computer data reading.
Temperature Compensation
Ensures stable performance in high-temperature environments.
Installation
Multi-Probe Wiring Options
Linear Wiring
Star Wiring
Linear Wiring Appearance
Communication Settings
1. Station Address
Default MODBUS address: 1 (configurable range: 1–247).
2. Baud Rate
Default: 19200bps (options: 4800/9600/19200/38400).
3. Protocol
Full MODBUS support; refer to Transmittance Digital Probe Communication Protocol for command details.