Submersible temperature sensors provide accurate temperature readings in various liquids, making them ideal for diverse applications across different industries. These sensors are designed to withstand the challenges of being fully submerged in liquids, ensuring reliable performance and longevity.
LMK458 Marine Approved Hydrostatic Level Transmitter - Marine approved level transmitter with 4-20mA output for measuring level of contents inside ship ballast, fuel, liquid cargo or wastewater tanks
STT-26 Submersible Temperature Probe and Transmitter - Submersible 4-20mA output sensing probe for immersion in freshwater, seawater or any other compatible liquid to measure liquid temperature.
SSTT Subsea Wet-Mateable Electrical Connector Temperature Transmitter - This RTD based temperature transmitter with subsea connector provides a 4-20mA output signal corresponding to ranges from 0…35 degC (95 degF) up to 100 degC (212 degF ).
LMP307T Submersible Level and Temperature Transmitter - The LMP307T is a submersible level and temperature transmitter with a level sensing range from 1 to 250 mH2O and a temperature sensing range of 0 to 30°C up to 70°C.
S12S SDI-12 Coms IP68 Pressure and Temperature Sensor - Combined pressure and temperature sensor with a 1200 baud rate serial data interface as defined by the SDI-12 support group.- S12C SDI-12 Seawater Pressure & Temperature Transducer - SDI-12 protocol transducer for sensing water depth level and temperature in seawater, brackish water, tidal water, saline water or leachate.
- Potable water underground 10ft dia storage tank temperature and level sensor
- Submersible water level and temperature probe with SDI-12/USB interface for freshwater monitoring
- 40 ftH2O Hydroelectric plant tailwater elevation & temperature sensor
- Aquaculture submersible freshwater level & temperature transmitter
- 200cm range 0-5Vdc output submersible road flood stream depth and PT1000 sensor
- Borehole pump protection water level and temperature sensor for 60m depth
Send us your enquiry to discuss your Temperature Measuring Submersible Sensors and Instruments application with a product specialist, and they will help you select the best option to suit your specific requirements.
Submersible temperature sensors are specialized instruments designed to measure the temperature of liquids in a wide range of applications. These sensors are fully immersible in the fluid, allowing for direct and accurate temperature measurement. They are typically constructed with a rugged, waterproof housing to protect the internal components from the liquid and ensure reliable operation even in harsh environments.
Product Advantages
Submersible temperature sensors offer continuous and accurate thermal monitoring directly in liquid media. Designed for reliable long-term performance, they combine extreme durability, seamless system integration, and precise measurement capabilities across demanding environments.
Direct In-Situ Measurement
By placing the sensing element directly into the fluid, these instruments provide real-time, highly accurate thermal data without delayed response times or thermowell losses.
Robust IP68 Construction
Hermetically sealed housings made from high-grade stainless steel, titanium, or specialized polymers ensure total ingress protection against water, harsh chemicals, and aggressive media under high pressure.
Long-Term Stability & High Accuracy
High-quality RTD (such as Pt100/Pt1000) or digital sensing elements ensure minimal signal drift over time, maintaining accurate readings even during continuous submersion.
Flexible Integration & Signals
Available with various standard output options, including 4-20mA analog loops, SDI-12, or digital RS485/Modbus interfaces, enabling seamless connection to dataloggers, PLCs, and telemetry systems.
Product Applications
Submersible temperature sensors are critical across a broad spectrum of industries requiring reliable, real-time thermal monitoring in liquid environments. From maintaining strict temperature thresholds in industrial processing to tracking environmental variations in natural bodies of water, these specialized instruments safeguard process stability, product quality, and regulatory compliance. Below is an overview of the primary application areas where submersible temperature probes and transmitters are routinely deployed.
Industrial Process Control
In food and beverage production, pharmaceutical manufacturing, and chemical processing plants, maintaining exact liquid temperatures is vital to ensuring product consistency, process yield, and strict safety compliance. Submersible temperature transmitters are placed directly inside batch mixing vessels, fermentation tanks, chemical storage units, and cooling loops to deliver continuous, real-time feedback. This enables automated control systems to regulate heating or cooling elements instantly, eliminating thermal lag and preventing batch contamination or product degradation.
Environmental & Oceanographic Monitoring
Environmental research and municipal water management require precise long-term temperature tracking across rivers, lakes, reservoirs, coastal zones, and groundwater aquifers. Submersible temperature probes built with corrosion-resistant housings and low-power digital interfaces (such as SDI-12 or Modbus) integrate seamlessly into remote telemetry stations and datalogging networks. They allow hydrologists, oceanographers, and environmental scientists to study ecological dynamics, detect thermal pollution, model climate impacts, and ensure overall aquatic ecosystem health.
Research & Development
Laboratories, pilot facilities, and academic research institutions rely heavily on high-precision submersible probes for specialized fluid dynamics experiments, thermodynamic testing, and chemical analysis. Featuring fast response times and exceptional stability, these sensors measure thermal gradients and transient temperature changes directly within liquid samples or scaled model tanks, providing reliable data points crucial for scientific validation and product development.
Aquaculture & Fisheries Management
Maintaining optimal water temperature is paramount in commercial fish farming, hatcheries, and aquatic research facilities, as subtle thermal fluctuations directly impact aquatic health, feeding efficiency, oxygen solubility, and growth rates. Submersible temperature sensors provide round-the-clock thermal monitoring in raceways, open-cage marine pens, and closed-loop recirculation aquaculture systems (RAS), allowing facility managers to trigger aeration systems, heaters, or automated feeding protocols to protect biomass health.
Wastewater & Water Treatment
Temperature plays a critical role in controlling biological treatment processes, sludge digestion efficiency, and chemical reaction rates in municipal and industrial wastewater facilities. Submersible probes featuring heavy-duty, clog-resistant IP68 enclosures are continuously immersed in aeration basins, settling tanks, effluent channels, and anaerobic digesters. Their robust design withstands heavy biofouling and harsh chemicals, delivering consistent operational data required for process optimization and regulatory reporting.
Oil & Gas / Petrochemical Operations
Subsea, offshore, and petrochemical extraction environments demand ruggedized temperature instrumentation capable of enduring extreme pressures, aggressive hydrocarbons, and harsh marine environments. Subsea wet-mateable and heavy-duty submersible transmitters measure fluid temperatures directly in cargo tanks, ballast systems, subsea manifolds, and mud pits. Constructed from high-grade titanium or marine bronze, these specialized sensors ensure dependable, explosion-proof performance in hazardous zones and deepwater installations.
Product Selection
Selecting the ideal temperature measuring submersible sensor involves carefully evaluating key technical parameters to ensure precise thermal tracking and long-term performance in demanding underwater or liquid environments. Essential considerations include determining the required operating temperature range and thermal exposure limits, choosing chemically compatible wetted housing and diaphragm materials, specifying durable cable insulation, selecting appropriate pressure ratings and electrical output signals, and confirming necessary environmental or hazardous area approvals.
Temperature Range & Thermal Exposure
Identifying the continuous operating temperature limits and expected thermal spikes of the liquid medium is crucial for choosing the correct sensing element and electronics. Standard submersible probes are suitable for ambient liquid monitoring, whereas high-temperature models feature integrated thermal compensation and heat-resistant internal componentry to prevent signal drift during elevated thermal cycles.
Wetted Materials & Chemical Compatibility
The chemical composition of the fluid dictates the necessary housing and seal materials. Applications involving potable or freshwater typically utilize 316L stainless steel, while aggressive media, marine environments, or industrial wastewater require corrosion-resistant alloys such as titanium, marine bronze, or specialized fluoropolymers to resist chemical attack and biofouling.
Submersible Cable Integrity
The immersion cable sheath must maintain structural flexibility, electrical insulation, and ingress protection under constant liquid submersion. Selecting robust cable materials like PUR for mechanical toughness, or TPE and FEP for high temperatures and chemical exposure, ensures reliable performance and maximum longevity.
Pressure Rating & Signal Output
Evaluating the maximum submersion depth ensures the sensor housing withstands external hydrostatic pressure without seal compromise. Additionally, selecting the appropriate output signal—such as 4-20mA current loop, 0-5V/0-10V analog voltage, or digital protocols like SDI-12 and RS485 Modbus—guarantees seamless integration with PLCs, telemetry units, and data loggers.
Environmental & Hazardous Approvals
Installations located in classified explosive atmospheres, such as wastewater digesters or petrochemical tanks, require intrinsically safe ATEX or IECEx certified sensor options. Likewise, marine deployments or drinking water storage facilities demand specific classification society or non-leaching certifications (e.g., DVGW/KTW) to satisfy compliance and safety regulations.