YSI ProSwap Logger
Features
- User-replaceable water quality sensors alongside built-in temperature and depth
- Smart sensor technology with on-board monitoring for improved calibration and performance
- Titanium housing and waterproof connectors guarantee operation well into the future
- Free ground shipping
- Expedited repair and warranty service
- Lifetime technical support
- More
Monitoring Made Simple
ProSwap Logger features a universal port for a wide variety of real-time monitoring applications. Combine any digital smart sensor with the built-in temperature and depth sensors for more comprehensive measurements in a slim profiling package. Build a dedicated system for conductivity, dissolved oxygen, pH, turbidity, or algae monitoring applications with unique customization options.
Continuous Unattended Logging
Ideal for short- and long-term deployments, the on-board memory is capable of holding over 100,000 data sets. With ProSwap Logger, you can view trends in water quality over extended periods of time for a true representation of the ecosystem.
Flexible Deployment
ProSwap Logger is a powerful instrument in a small package. Suspend in groundwater wells, deployment pipes, and other tight or shallow spaces. A variety of power and deployment options are available to fit the needs of your system.
Reliable Connection
An integral cable allows for easy topside communication and data download without removing the sonde from its deployment location. A twist-lock connector provides quick and reliable communication via a dedicated handheld or Kor Software. With convenient options for calibration, deployment setup, and data collection, ProSwap Logger makes it easier than ever to effectively expand you smart watershed.
Digital Smart Sensors
ProSwap Logger is compatible with any individual ProDSS Digital Smart Sensor for fast, easy setup and high quality data. Each sensor features a welded titanium body, auto-recognition, and local storage of calibration for quick swapping. Trusted by water quality professionals, these sensors provide accurate data with advanced technology and proven performance!
Material | 512 MB, >100,000 data sets (includes date, time, site, parameters) |
Software |
Kor Software |
Communications | Sonde: YSIP, SDI-12, Modbus* Adapters: USB, Flying-Lead |
Power |
External Powering: 5.4 - 16V |
Operating Temp. |
-5 to 50°C (23 to 122°F) |
Storage Temperature | -20 to 50°C (-4 to 122°F) |
Depth Rating |
0 to 100 m (0 to 328’) |
Battery Life |
≥ 90 days at 15 min log interval |
Sampling Rate | 1 per second (fastest) to 1 per day (slowest) |
Diameter | 2.65 cm (1.05”) |
Length (with guard) without Battery | 49.70 cm (19.57”) |
Length (with guard) with Battery | 57.35 cm (22.58”) |
Sonde Weight** with Battery |
0.57 kg (1.25 lbs) |
Sonde Weight** without Battery | 0.45 kg (0.99 lbs) |
Warranty |
2 Years |
*Modbus output configurable with post-launch update
**Total weight will depend on cable length
- ProSwap Logger with Integrated Cable
- Probe Guard
- Weight (for Probe Guard)
- Storage Sleeve
- Sponge
- Graduated Cylinder
- USB Drive (contains Kor Software)
- Cable Connector Cap
- Cable Grip Kit
- Cable Management Kit (4m, 10m, 20m) or Cable Spool (30m+)
- Maintenance Kit
- Desiccant Kit (Vented units ONLY)
In The News
From Pans to Buoys: Advancing Reservoir Evaporation Rate Monitoring in Texas
In warmer climates like Texas, high reservoir evaporation rates can lead to declines in water level and water availability during droughts, making monitoring essential in order to ensure water security during times of scarcity. 
 
According to the Texas Water Development Board (TWDB), evaporation rates in Texas were previously based on data collected from a sparse network of Class A evaporation stations, dating back to the 1960s. These pans were stationed near reservoirs and still remain a widely accepted standardized approach to measuring evaporation rates on land. 
 
Monthly pan-to-lake coefficients were developed in the 1980s to connect the data collected from the pans to known lake conditions, extrapolating evaporation rates of the lakes using the pan data.
Read MoreA Drop in the Ocean: Restoring London’s Tidal Thames
The United Kingdom has grappled with wastewater management problems for decades. Although sewage treatment in the 20th century allowed many rivers, including the tidal Thames, to have healthy fish populations, combined sewer overflows into rivers–most commonly during heavy rainfall–affected water quality and occasionally even killed fish. 
 
Problems reached a head in 2012 when multiple infractions of European urban wastewater treatment laws threatened costly fines, on top of the environmental cost of repeated sewage spills into British rivers. 
 
Fast forward to 2025, and after a decade of construction work, London’s Thames Tideway Tunnel , affectionately dubbed the “super sewer”, is now fully activated and ready for testing.
Read MoreHave You Heard? AI Buoys Revolutionizing Marine Mammal Monitoring in Whangārei Harbor, New Zealand
In one history, Whangārei Harbor, nestled in the lush hills of New Zealand’s North Island, gets its name from the Māori, “waiting for the breastbone of the whale.” It seems fitting, then, that it’s now home to state-of-the-art acoustic monitoring buoys listening for marine mammals around the clock. 
 
In September 2024, a team from Auckland-based underwater acoustics firm Cetaware Ltd installed NexSens buoys in Northport, a major commercial port at the entrance to the Whangārei Harbor. 
 
The first buoys to be installed by Cetaware in a permanent setting running 24/7, they use real-time artificial intelligence (AI) models to passively sense Delphinidae–from common dolphins to orcas. 
 
Dr.
Read More