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HermitCrab Pro – Convert Existing Controller To Smart Irrigation Controller with 4G LTE

  • HermitCrab Pro converts your existing irrigation sprinkler controllers to a 4G LTE Capable Smart Irrigation controller powered by Jain Unity®.
  • Powered by Jain Unity ® that automatically adjusts landscape watering schedules by zone/station based on weather forecast, plant types, soil, micro-climate, and other environmental data.
  • “Plug and Play” installation in under 10 minutes.

Includes 1 Year Subscription to Jain Unity ®.

Made In USA


MPN: 559122 SKU 559122 Category

Product Description

The JAIN patented retrofit technology can instantly convert an existing conventional controller into a smart controller. All the same features and functions from the JAIN SmartBox Controller are available now with the use of the JAIN HermitCrab Pro. 

HermitCrab Pro is compatible with most controller brands, most importantly the controller must have a remote control port. With the addition of a flow sensor you can measure, record flow and setup notifications in the event of a main line break or stuck valve. (Flow sensor sold separately and compatible with most available irrigation flow sensors.)


  • Great value: make your conventional controller “smart” for much less than the cost of a new smart controller.
  • With 20–50% water savings possible, payback can be just a few months.


  • “Plug and Play” installation in under 10 minutes.
  • Compatible with most major controller brands.


  • Remote monitoring + management via the web.
  • Single-platform simplicity allows management of multiple controllers of various brands at multiple sites—all with the JAIN Unity web-based system.
  • Includes the most popular labor-saving features of JAIN Unity online dashboard including water budgeting and rainfall forecast.
  • Flow Monitoring capability, with full reporting on learned flow rates per controller and per station.


Additional Information

Include Flow Adapter?

Yes, No

Existing Controller Model

Hunter, Irritrol or Toro (RJ 11 connector), Irritrol or Superior (6 pin remote connector), Weathermatic (RJ11 connector), Rain Bird (5 pin remote connector), Rain Bird host controller (6 pin remote connector), Rain Master (9 pin D type male remote connector)


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  • No merchandise may be returned without prior authorization and issuance of a return authorization number from IDC.
  • Credit will be based on invoice price.
  • A restocking fee of 20% (twenty percent) will be assessed on all returned goods unless a return occurred due to IDC’s error. Returned goods shall be shipped prepaid by Buyer and received in resalable, new condition before credit will be issued.
  • All returns are subject to inspection by IDC. Buyer will be billed for any freight charges incurred by IDC unless pre-approved by IDC and/or returned due to an IDC error.
  • No returns are accepted after 60 days.

Drop Us A Line

Starting a new project and want to make sure you’re getting the best system for your money? Looking to retrofit an existing greenhouse or grow room? We’ve got you covered every step of the way from design and engineering to construction and installation. 

Existing customers can use this form for any support requests or questions.

Business Hours: M-F 7:00 AM – 5:00 PM
Saturday 7:00 AM – 12:00 PM

Phone: (831) 228-8002

Connect your existing AvidWater Retail Store Account.

Fill out the form below and we will get back to you. If you have multiple users at your company/farm, they would need to register below as well. 

Best Price Guarantee

We’ll match the product prices of key online and local competitors.