Van Essen TD-Diver Water Level Loggers
The Van Essen TD-Diver is a reliable instrument used for the autonomous measuring and recording of groundwater levels and temperature.
Starting At
$740.00
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Availability
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.
Fondriest Exclusives
- 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:
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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
- Compact size: 22mm diameter x 110mm length
- Stores 72,000 records of time stamp, pressure and temperature with backup
- Continuous and fixed length memory (linear sample method)
Overview
The Van Essen TD-Diver is a reliable instrument for autonomous measuring and recording of groundwater level and temperature. Its internal memory of 72,000 measurements per parameter provides sufficient capacity to perform nearly one measurement every hour for 8 years. A new backup memory feature enhances data integrity. For each measurement, the Diver registers the date and time, groundwater level, and temperature.
Precision
The Van Essen TD-Diver is an easy-to-use datalogger featuring state-of-the-art electronics and a robust high-precision pressure sensor for long-term accuracy. The absolute pressure sensor requires minimal maintenance and re-calibration.
Applications
- Monitor potable water recharge areas for water supply
- Monitor tailing ponds, dewatering activities and water supply levels of mines
- General site investigations for construction
- Contaminant plume monitoring on spill sites, remediation sites, chemical storage facilities
- Landfill sites and hazardous waste storage sites
Questions & Answers
Can this logger read water level accurately in a 1" well?
The Van Essen TD-Diver measures about 0.9 in and is good for deplyoment in 2" and 4" wells. However, if the inner diameter of the well is larger than 22cm, then the logger can be deployed without any interferences.
How does the measurement range translate with Van Essen TD-Diver water level loggers?
The TD-Diver is pressure-rated for various ranges from 10-100m (33-328ft), which refers to the maximum amount of water that is expected to be above the sensor. For example, in a 100m well with a water level of 60m and a sensor deployed at 90m would only require a 30m range logger to perform accurately and prevent damage to the instrument.
Which Van Essen TD-Diver water level logger is the most accurate?
With Van Essen TD-Divers, the sensor's accuracy relates to the range. Lower-range sensors have more accuracy, while higher ranges have lower accuracy.
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Van Essen Diver-Link Cellular Telemetry System with Diver-Hub
The Van Essen Diver-Link Cellular Telemetry System enables professionals to monitor water level, conductivity and temperature readings from their home or office. The near real-time data allows scientists, managers, and other environmental professionals to monitor flood events, well depths and groundwater levels. Long-term monitoring allows users to develop trends on ever-changing climate conditions. The Van Essen Divers ( CTD-Diver, Cera-Diver, TD-Diver and Mirco-Diver) work well for monitoring water supply, tailing ponds, dewatering, contaminant plumes and hazardous waste storage sites . The Diver-Link allows users to monitor groundwater via the Diver-Hub Web Portal for real-time management of site data, equipment and water levels.
Van Essen TD-Diver: Robust Level Logger Ups Data Efficiency
All sorts of applications employ groundwater level loggers. These are typically deployed in piezometers, and log measurements for as long as the project requires. For those environmental professionals looking for a more long-term solution, the new Van Essen TD-Diver groundwater level logger is a solid choice. The new groundwater level logger launched in November 2016 with an eye toward including improvements to make it an even more robust option for groundwater monitoring. Over the years, through customer feedback and other experiences, managers at the company had envisioned quite a list of things to add. Among these, there are a few that environmental pros could really find handy.
The Great Miami River: Overcoming the Past and Protecting the Future
In March of 1913, rain began falling heavily on the Great Miami River Watershed in Southwest Ohio, descending over a region still saturated from a hard winter. Nearly a foot fell over three days, causing a surge of water through the Miami Valley equivalent to the discharge of Niagara Falls over 30 days. The flooding was catastrophic, leading to hundreds of deaths and over $2 billion in damages in today's economy. Across 10 cities, it swept away bridges, tore down telephone wires, and ignited fires that consumed whole blocks. In the wake of the catastrophe, and despite the unfathomable loss, the residents of the Miami Valley banded together to find a solution.
