Trimeter: Water Quality Probe
Solinst Eureka
2113 Wells Branch Pkwy, Suite 4400
Austin, TX, USA
78728
Tel: +1 512-302-4333
Fax: +1 512-251-6842
email: [email protected]
Trimeter
Three Parameters at
the Lowest Possible Cost
Solinst Field Services
Safeguard your project’s success and mitigate any potential for downtime or additional costs.

5001 Trimeter Water Quality Probe
Trimeter
Model 5001
The Trimeter is Solinst Eureka’s most compact multiprobe. The Trimeter incorporates the field-proven electronics of Solinst Eureka’s premier Manta+ multiprobes, with a smaller, lightweight instrument body. The Trimeter offers a powerful and affordable solution for water quality monitoring.
Select any one of Solinst Eureka’s water quality sensors (excluding ISEs, PAR, and CO2), and add temperature and/or depth (vented or nonvented) sensors. (Note that temperature is included for Trimeters with conductivity, pH, or DO sensors).
The Trimeter is an excellent choice when you need a self-powered probe for autonomous turbidity logging. For example, choose wipered turbidity with temperature and depth, or turbidity and temperature
sensors only.
Trimeters are also ideal for use in dye-trace studies, equipped with Rhodamine, Fluorescein, or other custom dye sensors from Solinst Eureka.
Use the Trimeter with Solinst Eureka’s MantaLink™ app for iOS or Android™, or Windows for the PC (data cable or USB adapter not included).
What are the Benefits of the Trimeter?
- Cost-Effective: Measure three parameters at a lower cost.
- Flexible Deployment: Use it for spot checking, logging, or connection to data stations/telemetry.
- Turbidity Logging: Sensor with built-in wiper, excellent for autonomous turbidity monitoring
- Easy to Use: Features LED diagnostic status indicators.
- Real-time Data: Connect to a powered data station via RS-232, or optional SDI-12 or MODBUS, or view on your smart device with MantaLink.
- Durable: Small, rugged, and lightweight design with a robust marine connector.
- Versatile: Compatible with all Solinst Eureka software apps (Windows, iOS, and Android) and communication cables.
- Reliable: 3 year limited warranty covers all components, including sensors

Applications Suited to the Trimeter
The Trimeter is as versatile as the flagship Manta+ multiprobe line when it comes to applications variety, including:
- Environmental Monitoring: Long-term monitoring to track water quality changes, assessing impacts of runoff, tracking saltwater intrusion, etc.
- Surface Water and Groundwater Sampling: Routine water quality checks and assessing aquifer
health. - Industrial Discharge Monitoring: Ensuring compliance and the effectiveness of treatment processes.
- Aquaculture: Maintaining optimal water quality conditions for fish and shellfish farming.
Water and Wastewater Treatment: Optimizing treatment processes and ensuring the quality of treated water. - Stormwater Runoff Monitoring: Tracking water quality impact and measuring the effectiveness of stormwater management practices.
- Dredging Operations: Monitoring turbidity to ensure compliance and to protect aquatic habitats.
- Mining Operations: Monitoring the impact of mining activities on water quality.
Research and Education: Conducting water quality research projects.
Flexible Comunications and Accessories
Underwater cables and data cables connect to the robust marine connector on the Trimeter. Underwater cables are available in lengths from 3 to 200 meters. Add an optional battery pack for self-powered logging. Use the mantaMobile™ to provide a Bluetooth® connection to the MantaLink app on your mobile device. Soft and hard carry cases, flow cells, and an anti-fouling sensor guard are also options.
Trimeter Specifications
Trimeter Sensor Specifications
For best accuracy, always calibrate near the anticipated field readings, and near the temperature of the anticipated field readings.
CAUTION: Never look directly at a fluorometer sensor. The UV rays emitted by the sensor can cause eye damage.
Related Products
Manta Series Water Quality Probes
Solinst Eureka offers the largest selection of water quality sensor technologies in the industry. So in addition to standard configurations, each probe may be customized for your specific application. Pick sensors of your choice to fully populate larger probes, or add a battery pack to convert a probe to a logging device.
EasyProbe: Water Quality Sondes
The EasyProbe, by Solinst Eureka, is a high-performance, cost-effective water quality monitor. It's ideal for spot-checking, remote telemetry, education, research, aquaculture, and more. The EasyProbe20 includes sensors for temperature, dissolved oxygen, conductivity, and pH, while the EasyProbe30 adds a turbidity sensor. Eureka multiprobes are known for their reliability, with a three-year warranty covering all sensors, and have the lowest maintenance costs in the industry.
Water Level, Temperature & Conductivity Datalogging
The Levelogger 5 LTC measures and logs water level fluctuations, temperature and conductivity. It is programmed to record at intervals as often as 2 seconds. It includes an 8-year battery, memory for 100,000 sets of readings, and comes in 6 pressure ranges. A PFAS-free coating (inside and out) provides superior corrosion and abrasion resistance.
TLC Meter – Measure Accurate Temperature, Level & Conductivity
A TLC Meter provides accurate, stable temperature and conductivity measurements, displayed on a convenient LCD display for easy reading. Static water level and depth of readings are read off Solinst flat tape, which is precisely laser-marked every mm or 1/100 ft. Tape lengths are available to 300 m (1000 ft).