Product Overview
The OHTS1098 Evaporation Transmitter is a water surface evaporation monitoring instrument based on pressure measurement principles. The device employs a gravimetric (weighing) method to measure liquid mass changes within an evaporation pan, calculating evaporation data through liquid level height variations.
Featuring a dual-layer 304 stainless steel structure, the device effectively isolates external thermal radiation and interference. Combined with digital sensor technology, it exhibits zero temperature drift and zero time drift characteristics. The output interface utilizes standard RS-485 signals with Modbus-RTU protocol, suitable for long-term continuous monitoring applications in meteorological stations, agricultural research, and hydrological observation networks.
Features
- Corrosion-resistant Construction: Entire unit constructed from 304 stainless steel with corrosion-resistant properties, suitable for long-term outdoor deployment
- Thermal Radiation Isolation: Dual-layer protective structure effectively isolates solar radiation heat and external interference, enhancing measurement stability
- Freeze-resistant Operation: Based on pressure-based gravimetric measurement principles, unaffected by liquid freezing; resolves failure issues of ultrasonic sensors under low-temperature and water-free conditions
- Protected Wiring Design: Bottom cable exit design reduces exposed wiring and lowers risk of line faults
- Flexible Power Supply: Wide DC voltage supply range of 10 - 30VDC, adapting to different power supply environments
- High Stability: Digital sensor architecture eliminates temperature drift and time drift, ensuring long-term stability
- Data Integrity: Electromagnetic interference immunity with data retention capability after power failure
- Weather Resistant: Maintains measurement accuracy under windy/wave and rainfall weather conditions
Applications
- Evaporation monitoring at meteorological observation stations
- Water evaporation research in plant cultivation environments
- Evaporation measurement in seed culture laboratories
- Agroforestry microclimate environment monitoring
- Hydrological evaporation observation for geological surveys
- Water surface evaporation measurement for scientific research experiments
- Automatic evaporation station data acquisition
- Water surface evaporation parameter monitoring at environmental monitoring stations
- Combined rainfall-evaporation monitoring stations (requires integration with rain gauge sensors)
- Evaporation node deployment in hydrological monitoring networks
Technical Specifications
| Parameter | Specification | Remarks |
|---|---|---|
| Supply Voltage | 10 - 30VDC | - |
| Power Consumption | 0.17W | - |
| Measurement Range | 0 ~ 200mm | Evaporation liquid level height |
| Measurement Accuracy | ±1%FS | Percentage of full scale |
| Response Time | <1s | - |
| Output Type | RS-485 | Standard Modbus-RTU protocol |
| Protection Rating | IP66 | - |
| Operating Temperature | -40 ~ 85℃ | - |
| Operating Humidity | 0 ~ 100%RH | - |
| Storage Temperature | -40 ~ 125℃ | - |
| Storage Humidity | <80%RH | No condensation |
| Inner Cylinder Diameter | 18.4cm | - |
| Inner Cylinder Height | 20cm | - |
Physical Specifications
| Parameter | Specification |
|---|---|
| Inner Cylinder Diameter | 18.4cm |
| Inner Cylinder Height | 20cm |
| Material | 304 Stainless Steel |
| Structure Type | Dual-layer stainless steel protection |
FAQ
Q: Can this device be used as a safety or emergency stop device?
A: No, this device is strictly prohibited from use as a safety device or emergency stop device, nor shall it be used for other purposes where equipment failure may cause personal injury. Failure to follow operating instructions may result in serious injury.
Q: What preparations are required before installation?
A: Before installation, you must loosen the bottom support screws and remove the top support foam pads, ensuring the inner cylinder is in a freely suspended state. Also inspect the device function to ensure normal operation and parameter compliance.
Q: Can I disassemble or repair the device myself?
A: No, unauthorized technical personnel are prohibited from disassembling, repairing, altering, or modifying internal device components. All maintenance must be performed by authorized technical personnel.
Q: Is the device completely waterproof?
A: Although the device possesses an IP66 protection rating, prolonged immersion or direct high-pressure water jet exposure to connector areas must still be avoided to prevent damage.
Q: What is the warranty coverage?
A: The warranty period is 12 months from the date of purchase. It covers failures caused by inherent mechanical defects, material issues, or workmanship problems under normal use and maintenance conditions. It does not cover damage from incorrect installation, unauthorized disassembly, negligent use, or operation beyond technical specifications.