--- title: "Submersible MDT: Fully Waterproof Wireless Metering for Extreme Wet Conditions | Tehama Wireless" description: Tehama Submersible MDT provides accurate water level and flow monitoring in extreme wet environments with a fully waterproof, epoxy-encased enclosure. It includes a two-foot or optional forty-foot sensing cable and an internal temperature sensor for freeze detection. Designed for pit meter installations, it mounts securely to plastic lids using screws or waterproof adhesive. With wireless coverage from one to over ten miles, it supports durable, long-range monitoring across agricultural sites, modular home communities, multi-family housing, and utility infrastructure. --- [![Tehama Wireless](https://www.tehamawireless.com/hubfs/raw_assets/public/Tehama_Wireless_March_2024/images/hd_logo.png "Tehama Wireless")](https://www.tehamawireless.com/?hsLang=en) - [Products](https://www.tehamawireless.com/products) - [Technologies](https://www.tehamawireless.com/product-technologies) - [Devices](https://www.tehamawireless.com/product-devices) - [Applications](https://www.tehamawireless.com/applications) - [Multifamily Housing](https://www.tehamawireless.com/applications/multifamily-housing-submetering) - [Manufactured Homes](https://www.tehamawireless.com/applications/manufactured-home-communities-submetering) - [Commercial Properties](https://www.tehamawireless.com/applications/commercial-properties-application) - [ESG & Sustainability](https://www.tehamawireless.com/applications/esg-sustainability-submetering-solutions) - Resources - [Blog](https://www.tehamawireless.com/blog) - [Case Studies](https://www.tehamawireless.com/case-studies) - [Guides](https://www.tehamawireless.com/guides) - [Company](https://www.tehamawireless.com/about) - [Support](https://www.tehamawireless.com/support-and-training) - [Documentation & Resources](https://www.tehamawireless.com/documentation-and-resources) - [Contact](https://www.tehamawireless.com/contact) - [WebApp Login](https://web-ui.tehamawireless.net/login?redirect=%2F&hsCtaAttrib=179957158733) - Search Tehama Wireless # Looking for answers? Type your questions here This is a search field with an auto-suggest feature attached. SEARCH - There are no suggestions because the search field is empty. ## POPULAR: [Retrofitting Older Buildings... ](https://www.tehamawireless.com/blog/retrofitting-older-buildings-for-water-submetering-challenges-solutions-and-future-trends?hsLang=en) [7 Essential Tips for... ](https://www.tehamawireless.com/blog/7-essential-tips-for-choosing-a-water-utility-submetering-solution?hsLang=en) 1. [ Home ](https://www.tehamawireless.com/) 2. [ Documentation ](https://www.tehamawireless.com/documentation-and-resources) 3. [ Submersible MDT ](https://www.tehamawireless.com/data-sheets/submersible-mdt-water-level-monitoring#) ![Tehama Wireless Submersible MDT](https://www.tehamawireless.com/hs-fs/hubfs/Data%20Sheet%20Images/tehama-wireless-submersible-meter-transmitter-standard-max-range.png?width=150&height=187&name=tehama-wireless-submersible-meter-transmitter-standard-max-range.png) ## MDT # Submersible Data Transceiver ### Standard, MAX and LoRaWAN® Systems ## Product Overview Our IP68-rated Submersible MDT pairs a MAX-Range-class radio board with a fully epoxy-potted enclosure and sealed lithium battery for true waterproof operation exceeding ten years.   The unit is offered in three radio families—Standard, MAX and LoRaWAN®. Each can be ordered with a single pulse input (code **S-P**) or a single Sensus/Neptune encoder input (**S-E**). All versions include an internal temperature sensor. Meter leads are spliced to the MDT’s pre-attached wires using waterproof IDC connectors. A built-in LED shows status; a magnet swipe on the case replaces the push-button of our regular MDTs for test transmissions and link-quality queries.   For pit installations, mount the housing upside-down to the underside of a plastic pit lid using the screw tabs or waterproof adhesive. This places the antenna in an air pocket near the surface for optimal range. ## Specifications | Specification | Details | | --- | --- | | Input Options | • **S-P** – pulse input (water, gas, electric, BTU, runtime) • **S-E** – Sensus/Neptune encoded protocol • All variants include internal temperature sensor | | Data Resolution | 1-hour interval | | Radio | 902 – 928 MHz; FCC/IC certified Open-field ≈ 2 mi (Standard) Open-field ≈ 10 mi (MAX & LoRaWAN) * | | LED | Indicates power and RF-link status | | Operating Environment | -20 ° to 145 °F; IP68 (fully submersible) | | Power | Sealed 3.6 V primary lithium cell | | Typical Battery Life | 10 + years @ 50 – 90 °F (reduced at extremes) | | Dimensions | 6.2″ × 2.4″ × 1.5″ | | Warranty | Five years (batteries excluded). See our [warranty page](https://www.tehamawireless.com/support-products-warranty?hsLang=en). | Continual product enhancements may cause specifications to change without notice. *Actual range varies with installation and topography. ## Models | Standard System | Model # | Description | | --- | --- | --- | | Submersible MDT, Pulse | TW-167S-P | Single pulse input, 1-h data, includes temperature | | Submersible MDT, Encoder | TW-167S-E | Single Sensus/Neptune input, 1-h data, includes temperature | | MAX System | Model # | Description | | Submersible MDT, Pulse | TW-177S-P | Single pulse input, 1-h data, MAX network, includes temperature | | Submersible MDT, Encoder | TW-177S-E | Single Sensus/Neptune input, 1-h data, MAX network, includes temperature | | LoRaWAN® System | Model # | Description | | Submersible MDT, Pulse | TW-187S-P | Single pulse input, 1-h data, LoRaWAN network, includes temperature | | Submersible MDT, Encoder | TW-187S-E | Single Sensus/Neptune input, 1-h data, LoRaWAN network, includes temperature | * Adequate repeater / gateway coverage is required for guaranteed delivery. **Note:** Standard, MAX and LoRaWAN systems are NOT compatible. Refer to [AN-119](https://www.tehamawireless.com/support-products-tehama-max-range-series-faq-app-notes-2001?hsLang=en) for additional information. ## Pulse Wiring TW-167/177/187 S-P Submersible MDTs These MDTs have pre-attached wires; splice to the meter leads with waterproof IDC connectors. For pit use, seal the splice inside a grease-filled pod. ![Submersible pulse wiring](https://www.tehamawireless.com/hs-fs/hubfs/Data%20Sheet%20Images/submersible-mdt-wiring-pulse.png?width=624&height=200&name=submersible-mdt-wiring-pulse.png) ## Encoder Wiring TW-167/177/187 S-E Submersible MDTs Wiring procedure is identical to the pulse version; splice colour-coded leads with waterproof connectors and seal if submerged. ![Submersible encoder wiring](https://www.tehamawireless.com/hs-fs/hubfs/Data%20Sheet%20Images/submersible-mdt-wiring-encoder.png?width=624&height=196&name=submersible-mdt-wiring-encoder.png) ## Operation Swipe a magnet over the marked areas to mimic a button press for test transmission or link-status query; the LED provides the same green/amber/red feedback as regular MDTs. ![Submersible MDT magnetic activation areas](https://www.tehamawireless.com/hs-fs/hubfs/Data%20Sheet%20and%20App%20Notes%20Images/submersible-operation-and-radio-installation-magnetic-areas.png?width=875&height=280&name=submersible-operation-and-radio-installation-magnetic-areas.png) [ Download the Data Sheet ](https://www.tehamawireless.com/hubfs/Collateral/Data-Sheets/Tehama-Wireless-Submersible-MDT-Data-Sheet.pdf?hsLang=en) - [Use Cases](https://www.tehamawireless.com/applications) - [Multi-family Apartments](https://www.tehamawireless.com/applications#multifamily) - [Manufactured Homes](https://www.tehamawireless.com/applications#manufactured) - [Commercial Properties](https://www.tehamawireless.com/applications#commercial) - [Campus Facilities](https://www.tehamawireless.com/applications#campus) - [Homeowners Associations](https://www.tehamawireless.com/applications#hoa) - [Landscaping](https://www.tehamawireless.com/applications#landscaping) - Resources - [Blog](https://www.tehamawireless.com/blog) - [Case Studies](https://www.tehamawireless.com/case-studies) - [Guides](https://www.tehamawireless.com/guides) - [Use Cases](https://www.tehamawireless.com/applications) - [Privacy Notice](https://www.tehamawireless.com/privacy-notice) - Company - [Company](https://www.tehamawireless.com/about) - [UMCA Member](https://www.utilitymca.org/members.html) - [Contact](https://www.tehamawireless.com/contact) - [Tehama Brochure](https://www.tehamawireless.com/hubfs/Tehama_Wireless_April2024/Pdfs/Tehama---Brochure---Website.pdf) ![Tehama Wireless](https://www.tehamawireless.com/hs-fs/hubfs/raw_assets/public/Tehama_Wireless_March_2024/images/ft_logo.png?width=40&name=ft_logo.png "Tehama Wireless") ** Tehama Wireless ** 2431 5th Street Berkeley, CA 94710 1-415-495-7344 [![](https://www.tehamawireless.com/hubfs/linkedin-big-logo.svg)](https://www.linkedin.com/company/tehama-wireless/) © Copyright 2026 Tehama Wireless. 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