
WTR2040 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $129.60 | Condition is New, 100208653 LOCHINVAR WTR2040K KIT FLOW SWITCH WITH PADDLE, FREE SHIPPING | 100.0% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $89.00 | Top Pick! Condition is New – Open box, Lochinvar Industrial Flow Switch WTR2040 NEMA 1, shipping cost = $8.75 | 100.0% |
![]() | $199.99 | Top Pick! Condition is New – Open box, Lochinvar Taco IFS01BL-S1 Industrial Flow Switch WTR2040 NEMA 1, FREE SHIPPING | ![]() |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $71.73 | Top Pick! Condition is Seller refurbished, Lochinvar Industrial Flow Switch IFS01E-S-WTR2040 Gray ***Read Description***, shipping cost = $14.95 | 99.8% |

The Lochinvar WTR2040 Flow Switch with IFSEL-S Transmitter is a reliable and accurate water flow monitoring solution designed for use with Lochinvar's high-efficiency water heaters. This flow switch comes with an integrated IFSEL-S transmitter, which allows for easy integration with building automation systems and remote monitoring capabilities.
The WTR2040 flow switch utilizes a positive displacement sensor to measure the volume of water flowing through it. This technology provides accurate and consistent flow readings, even in applications with fluctuating water pressure. The switch is factory calibrated for a specific flow rate, ensuring precise and reliable operation.
The IFSEL-S transmitter communicates flow data using HART protocol, making it easy to integrate with building automation systems. The transmitter also features a 4-20mA output signal, which can be used for direct connection to recording instruments or other devices.
The WTR2040 flow switch is designed for use with water temperatures up to 212 F (100 C) and can handle water flow rates up to 12 GPM (45 LPM). It is constructed from 316L stainless steel, making it durable and resistant to corrosion in harsh water environments.
The flow switch and transmitter are factory-mounted on a 3-inch (76mm) NPT threaded connection, making installation quick and easy. The device also features a field adjustable setting for minimum flow rate, allowing for customization to specific application requirements.
The WTR2040 flow switch with IFSEL-S transmitter is an essential accessory for Lochinvar water heater systems, providing accurate flow monitoring and integration with building automation systems. Its durable construction and reliable operation ensure long-lasting performance and peace of mind for facility managers and engineers.
Lochinvar WTR2040 Flow Switch IFs01e-S-WTR2040: A Comprehensive Analysis
The Lochinvar WTR2040 Flow Switch IFs01e-S-WTR2040 is a popular choice in the market for flow switching applications. This device is designed to provide reliable flow sensing for various systems, including water and other liquids. In this analysis, we will discuss the pros and cons of investing in this flow switch to help you make an informed decision.
Pros:1. High-precision flow sensing: The Lochinvar WTR2040 Flow Switch offers accurate and reliable flow sensing, ensuring efficient operation of the system.
2. Wide flow range: This flow switch can handle a wide range of flows, making it suitable for various applications.
3. Versatile mounting options: It comes with different mounting options, enabling easy installation in various configurations.
4. Durable construction: The device is built to withstand harsh environments and prolonged usage.
5. Self-diagnostics: The flow switch includes self-diagnostics, which helps in identifying and resolving potential issues.
Cons:1. Limited compatibility: The WTR2040 Flow Switch may not be compatible with all systems and applications, so it's essential to check the specifications before purchasing.
2. Higher cost: Compared to some other flow switches in the market, the Lochinvar WTR2040 may have a higher price point.
3. Manual calibration: The flow switch requires manual calibration, which might require additional time and expertise.
Conclusion:The Lochinvar WTR2040 Flow Switch IFs01e-S-WTR2040 offers several advantages, such as high-precision flow sensing, versatile mounting options, and self-diagnostics. However, it may have some limitations, like limited compatibility and higher cost. Considering the pros and cons, this flow switch is an excellent investment for applications that require reliable and accurate flow sensing and can accommodate the higher cost. It is essential to ensure compatibility with the specific application before making the purchase.
Recommendation:If you are looking for a reliable and accurate flow switch for applications where efficiency and precision are crucial, the Lochinvar WTR2040 Flow Switch is a great choice. Its versatile mounting options and self-diagnostics make it a valuable addition to various systems. However, it is essential to assess the compatibility and cost before making the investment.
Details:
But the tab where screw goes in is still a little bent. This does not appear to be used. Please look at all the photographs carefully. The lid was bent, and I straightened it out.
specifications maxohvac:
- brand: Lochinvar
- mpn: Wtr2040
- type: Flow Switch
- country of origin: United States
returns maxohvac:
- time: 30 days
- policy: returns accepted
- method: money back
- paid by: buyer
shipping maxohvac:
- carrier: usps, ups
- class: standard, economy
- transit: 3-9 days
- type: calculated
- service: usps ground advantage, ups ground saver
general maxohvac:
- category: Business & Industrial > Hvac Refrigeration
seller maxohvac:
- rating: 99.8%
- # reviews: 3895
- city: pueblo, colorado
payments maxohvac:
- other
- credit card: diners-club
- wallet: apple-pay
offer maxohvac:
- options: ship-to-home
- availability: in stock
- prices: $71.73–$199.99
- item condition:
- New
- New – Open box
- Seller refurbished
- best offers: true
- sold #: 7
- in stock #: 4
- started: april 22, 2026
Also Viewed:
- 100163242: WATER TRAP FLOAT SWITCH HEATER, Lochinvar
- 100208174: SWITCH MANUAL, Lochinvar
- 100208550: SWITCH, A O Smith
- 100208242: SWITCH, Lochinvar
- 100208384: PRESSURE SWITCH, Lochinvar
- 100093812: SWITCH, Lochinvar Ao Smith
- RLY2042K: KIT SWITCH COIL, Lochinvar
- PRS2704: PRESSURE DRAIN SWITCH, Lochinvar
- 100166234: PRESSURE SWITCH, Lochinvar
- 100208173: SWITCH, Lochinvar A O Smith
- 100187859: SWITCH, Lochinvar A O Smith




