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NexSens T-Node FR Thermistor String
The NexSens T-Node FR thermistor string provides high precision temperature measurement in an addressable and connectorized assembly.
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Your Price
$365.00
Stock
16
AVAILABLE
This item is currently on order from the manufacturer, but it has not yet arrived to our warehouse.
For a current estimate of availability, please call 888-426-2151 or or fill out the form below:
This item drop ships directly from the manufacturer, and the actual lead time is dependent on availability at their warehouse.
For a current estimate of availability, please call 888-426-2151 or or fill out the form below:
Fulfillment times may be longer than usual due to component shortages and other factors outside of our control.
For a current estimate of availability, please call 888-426-2151 or or fill out the form below:
Shipping Policy
Return Policy
Shipping, Delivery, Order Processing & Product Availability
Fondriest uses the best carriers to make sure orders get to you on time. Learn more about shipping times, methods, costs, and carriers.
Delivery Time
Shortly after you place your order, you will receive an Order Acknowledgement email to confirm your order details, including shipping and a delivery estimate. Once your order has been prepared for shipment and shipped, you will receive a Shipment Notification email with the carrier and tracking information.
Shipping and Delivery Estimates
The 'Ships' timeframe is an estimate of when the item will ship from our warehouse. All items will ship at one time unless you specifically request a partial shipment. In which case, the items on your order will ship as they become available.
The ‘Delivers’ timeframe is an estimate of when the item will be delivered. The estimated delivery time depends on the shipping method you choose during checkout. All estimates are based on business days.
Shipping Options
Fondriest offers several convenient shipping options via UPS.
| Ground Shipping: | Products shipped via ground service are typically delivered within five business days after shipment. |
| 2-Day Shipping: | For an additional charge, Fondriest offers 2-day shipping for most products. Products shipped via two-day service prior to 4:00 p.m. EST are usually delivered by 7:00 p.m. local time two business days after shipment. |
| Overnight Delivery: | For an additional charge, Fondriest offers overnight shipping for most products. Products shipped via overnight service prior to 4:00 p.m. EST are normally delivered by 7:00 p.m. local time one business day after shipment. Earlier overnight delivery options may also be available, depending on the destination. |
| Your Account: | For no additional charge, Fondriest can ship on third-party customer accounts via UPS and FedEx. Note that FedEx Ground shipments are picked up the following business day, and Express shipments must be made before 1:00 p.m. EST to ensure same-day pick-up. |
Remember that these estimates are for time in transit only and that they do not apply until the product leaves the Fondriest warehouse. As the delivery of your order is beyond Fondriest’s control once your order leaves the Fondriest warehouse, we cannot assume liability for late deliveries, regardless of the delivery method you specify.
Signature Required on Most Deliveries
Most of Fondriest’s shipments contain valuable equipment. If you will not be at the shipping address to accept delivery of your product, consider shipping the item to an address where someone you trust will be available to sign for your package, or accept your package if a signature is not required for the delivery.
Once your order has prepared for shipment or has shipped, we are unable to change the shipping address. Title and risk of loss to all products will pass to you on delivery. If you are willing to assume the risks of delivering your order without a signature, you may authorize Fondriest to arrange for a delivery that does not require anyone to be at the delivery address.
Undeliverable Packages
Occasionally, packages are returned to Fondriest as undeliverable. When the carrier returns an undeliverable package to Fondriest, please contact us to make arrangements for reshipment.
Failed Delivery Attempts
Most of Fondriest carriers make three attempts to deliver a package. After three delivery attempts, the carrier will return the package to Fondriest.
Order Processing
The estimated shipment date on your order is based on product availability, payment processing time, and warehouse processing time and does not include transit time. We do not begin payment processing until Fondriest receives all of the information that is needed and full payment or a full authorization, in the case of credit card or rental orders.
Fondriest will begin payment processing for orders placed on weekends or holidays on the next business day. Business days are Monday through Friday, excluding federal holidays.
Your order for in-stock items that are eligible for same-day shipping must be received before your local time of 2:00 p.m., pending payment processing, for there to be adequate remaining time in the day for your order to be dispatched.
Product Availability
Fondriest makes every effort to ship your product according to the estimated lead times. The estimated lead times are in business days (Monday through Friday, excluding federal holidays). Although Fondriest makes every effort to ship your order according to the lead time provided, shipping dates may change due to changes in supply. If the lead time changes, Fondriest will contact you via email and provide a revised shipping estimate.
Fondriest makes every effort to supply the products you order, but there may be occasions when Fondriest confirms orders and later learns that it cannot supply the products, either at all or in the quantities ordered. Although rare, these occasions can include when Fondriest learns that the products are no longer being manufactured or they otherwise become unavailable, when Fondriest cannot source components for the configuration you ordered, or when there was a pricing error at the Fondriest Online Store.
In those circumstances, Fondriest will inform you and, if you are interested, Fondriest may suggest alternative products that may meet your needs. If you do not wish to order alternative products, Fondriest will cancel your order for products that cannot be supplied and for any other products that you no longer wish to order as a result, and will issue a refund.
If you are not completely satisfied with your purchase, you may initiate a return within 30 calendar days of receiving your item(s). To begin a return, you must request a Return Material Authorization (RMA) by either contacting your account representative or the general customer support address: customercare@fondriest.com.
Returns without an RMA will not be accepted.
Items returned for credit must be new, unused, and in the original packaging (including any accessories, manuals, and documentation that shipped with the product). Returned items must be received by Fondriest Environmental within 14 calendar days of the issuance of the RMA.
All returned items are subject to inspection and approval prior to the issuance of any credit. If the returned items have been approved, Fondriest will issue a credit based on the original method of payment. Please note that items may be subject to a manufacturer’s restocking fee.
Non-Returnable Items: Fondriest does not permit the return of or offer refunds for the following products:
- Configured-to-order or customized products
- Hazardous materials
- Opened calibration reagents
- Opened software
- Software downloads
- Fondriest Gift Cards
Fondriest recommends using a carrier that offers shipment tracking for all returns. Packages should be insured for the full value in case of loss or damage. Fondriest does not assume any liability for loss or damage to the product during shipping.
America’s Premier NexSens Dealer!
- Free ground shipping
- Lifetime tech support
- Product Training
- Free 30-day returns
- Quick shipment
At Fondriest, we are committed to providing high-quality products at affordable prices with the industry's best support. Additionally, we offer:
-
Discounts
High volume purchases lead to favorable pricing, which is passed on to the customer by way of discount off MSRP.
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Assembly, Test and Calibration
Sensors and instruments are assembled, tested and calibrated prior to shipment. A calibration report is included.
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Lifetime Technical Support
A knowledgeable staff of applications engineers provides ongoing support for the life of the product.
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Product Training
Applications engineers are available for webinars or personalized, on-site startup and training. Extensive measurement technology, product troubleshooting and instrument repair workshops are offered at the Field Station.
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Extended Warranties
Warranties extended beyond factory standards are offered on many items to ensure a lasting useful life.
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Repair
A factory-authorized service center provides fast turnaround product repair and annual maintenance.
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Rental
Rental equipment is available to minimize downtime and cover equipment needs when projects expand.
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Communications
Call, email or chat online with applications engineers. Email correspondence is responsive and a toll-free number is available for added convenience.
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Quick Ship
Many orders ship on the same day and expedited shipping is available. If a product cannot be shipped immediately, customers are notified by phone or email.
VIDEO DEMO 
SCHEDULE DEMO
Key Features
- Build multi-point temperature strings by connecting T-Nodes to underwater cables
- +/- 0.075 C accuracy for precision temperature measurements
- Includes sensorBUS for connecting other smart sensors
The NexSens T-Node FR Thermistor String provides high accuracy temperature data in a connectorized and addressable architecture for water quality profiling. Each node features an integral titanium thermistor secured and epoxied in a protective housing for underwater deployments. The nodes are connected in-series using marine-grade UW Cables with braided Kevlar core and double O-ring seals.
Each T-Node FR sensor is accurate to +/-0.075 C for high-precision measurements. The exposed titanium thermistor makes direct contact with water, allowing readings to stabilize within 60 seconds. Temperature data is transmitted on a RS-485 Modbus RTU string bus for integration with data loggers and SCADA systems. The string is powered by 4-28 VDC for operation on a 12 or 24 VDC power supply.
Mating UW Cables are available in lengths from 0.5m to 50m with a maximum 1,219 meters (4,000 feet) or 250 nodes. Strings terminate in a NexSens UW plug and receptacle connector, allowing additional sections or sensors to be added as required. Optional accessories include water quality sensors, pressure sensors, signal splitters, cable clamps, stainless steel mooring line, and communication adapters.
- Sensor: Thermistor
- Range: 0 to 45 C (32 to 113 F)
- Accuracy: +/-0.075 C
- Resolution: 0.01 C
- T90 Response Time: 60 seconds
- Refresh Rate: 2 seconds
- Maximum Sensors: 250
- Maximum Length: 1219m (4000 ft.)
- Maximum Depth: 200m (656 ft.)
- Communications: RS-485 Modbus RTU
- Power Requirement: 4-28 VDC
- Current Draw Per Node: 1.65mA active; 1.45mA idle; 0.04mA sleep
- Connection Seal: Double o-ring, gland and face seal
- Connector: 8 pin, sensorBUS
- Dimensions: 13.46cm L x 3.56cm Dia. (5.3" L x 1.4" Dia.)
Questions & Answers
Do the sensors log internally?
No, the sensors must be connected to a data logger that supports RS-485 Modbus RTU.
What is the temperature range of these sensors?
The temperature range is 0 to 45 C (32 to 113 F)
How are these sensors deployed?
The sensors are connected to each other via UW cables of user-defined lengths. The custom string is attached to a mooring line using TS-Clamps.
Can other sensors be deployed with the temperature string?
Yes, using a UW-2W sensor splitter, other SDI-12 and/or RS-485 water quality sensors can be integrated along the sensor string.
What is the response time of the thermistors?
The T90 response time is approximately 60 seconds.
What is depth rating of the sensor and connector?
The depth rating of the T-Node FR sensor and connector is 200 ft.
What is the maximum length I can have?
4000 ft or 250 nodes (sensors) is the maximum length of a T-Node FR thermistor chain. Please note that the maximum depth of the sensors is 200 ft.
How often should I calibrate my T-Node FR?
Although T-Node FR sensors are capable of holding the initial factory calibration indefinitely, NexSens recommends that temperature strings be sent in for a factory recalibration every three years to ensure maximum sensor performance.
What is RS-485 Modbus RTU?
RS-485 Modbus RTU is a digital communications protocol in which the sensor outputs data. Standardizing how the data is sent from the sensor makes the integration into a data logger or PLC much more straightforward. RS-485 Modbus RTU is an addressable protocol that offers significantly more sensor capacity than other protocols such as SDI-12. This allows the T-Node FR and TS210 temperature strings to accommodate up to 250 sensors along a maximum of 4000 feet of cable. Most data loggers and programmable logic controllers (PLCs) support Modbus.
For what applications is the T-Node FR optimized?
The T-Node FR is used in a variety of applications from water storage tanks to temperature profiling in lakes and reservoirs. In lakes and reservoirs, temperature strings help identify stratification and lake turnover. They are also used in selective withdrawal dams to determine the optimal location to withdraw water. A single temperature node can be used for basic water or ambient air temperature monitoring.
What are common sensors to add onto a T-Node FR string?
Dissolved oxygen sensors are frequently added to thermistor strings to help identify hypoxic zones in lakes. A two-way sensor splitter can replace any temperature node in the string and allow for integration of a third party sensor that outputs data over SDI-12 or RS-485 Modbus RTU.
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T-Node FR thermistor string sensor, UW connector
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