847-775-0640 Call us M-F 9-5:30 CST

Finnex HC810-M Digital Controller

Product code: 3260

Availability: In stock

Ships Monday, June 14 if ordered in the next 2 days, 6 hours and 25 minutes!

Regular Price: $49.95

Special Price: $44.95

Reward Points Policy You will earn 2,497 AQUAPOINTS for buying this product.

HC810M Controller Features: 

  • Precision digital control, maintain water temperature at a constant level
  • Advanced digital heating control technology with adjustable low/high temperature alert setting
  • Automatic shut off overheat protection - when the water temperature over the high temperature alert setting value, the alarm will start beeping. The heating process will also be shut off automatically.
  • LED water temperature reading
  • Three prongs power receptacle works with Finnex 300W, 500W & 800W heating tubes and other brand's heating elements. 


  • Control Range: 0F - 99F * Accuracy: +-2F
  • Maximum Load: 800W
  • Over Load Fuse: 10A
  • Default High Alert: 93F
  • Default Low Alert: 36F
  • Power cord: Male 69"
  • Power cord: Female 6" 1/2"
  • Sensor: 44"


Questions on Finnex HC810-M Digital Controller

  • From Frank at 11/21/2018 1:42 AM
    • From one review, it seems that it is possible to connect more than one water heater to this unit, doesn’t it?
    • Frank,
      Yes, you can connect more than one heating element to this controller. Please note that total wattage of the heating elements can not exceed 800 watts.

    • Do you find this question helpful?  Yes   No
  • From Mark at 12/1/2018 5:19 PM
    • Does this remember your settings if the power goes out.
      two of your reviews are conflicting on this.
      I need it to maintain settings during a power loss.
      This will be placed in my sump and i need it to shut off during feedings
      Thank you
    • Mark,
      New (current version) of this controller remembers settings and will reset to the same temperature after the power loss.
    • Do you find this question helpful?  Yes   No

Ask Your Own Question

  1. Nice heater controller Review by Crazydiamond
    Product Rating:

    I have 2 x 300w ehiem heaters plugged into this unit. I set it and forget it. Have been running for 1 week and temp stays stable. Great device to keep temperature stable. (Posted on 4/17/2020)

  2. High-end product Review by NEP2NREV2
    Product Rating:

    Paired this controller with an 800 watt heater. Keeping the water temp in my 300g system very stable. (Posted on 11/13/2018)

  3. fine controller Review by robert
    Product Rating:

    This is by far the best, everybody should by one if you want exact temp control, can't say enough good things about this product. (Posted on 2/5/2017)

  4. heater controller Review by robert
    Product Rating:

    i would recommend this to anyone. great controller and keeps very accurate temp. will buy another for backup protection. (Posted on 2/3/2017)

  5. great value, reliable Review by JB
    Product Rating:

    Good price Very reliable as I have many of this brand (Posted on 12/11/2016)

  6. very stable and easy to use. set and forget Review by mike
    Product Rating:

    I added 2 of these controllers with 800w finnex titanium heaters in the sump of my 500 gallon freshwater and it stays within 2 degrees of the setting clear to the bottom of the tank.
    what a joy to own. (Posted on 8/24/2016)

  7. Lots of features for the price Review by Sonny
    Product Rating:

    This is the 2 degree standard of heater controllers. Meaning whatever you set it has to drop a degree to heat up. Then when it does it heats over the set point by one degree to stop. So 78 set would be 77 to turn on and 79 to turn off. I was using an elaborate controller that did a lot of other things but 3 years in either the heater prob died or the controller. So thought would go basic again and this handles two heaters on my 180 reef. Seems well built and easy to program. Dual relays for for over temp safety with alarms and a memory that if you lose power it remembers the settings you had. (Posted on 2/29/2016)

  8. Finnex Heater and Controller Review by JAMES M

    Excellent heater and controller. Really gets the job done. Like the alarm feature if temperature is too high or too low. My only complaint is that when it is unplugged, all of the settings need to be re-set. Have used many heaters and controllers, and this is one of the best." (Posted on 1/25/2014)

Write Your Own Review

You're reviewing: Finnex HC810-M Digital Controller

How do you rate this product? *

Product Rating: 1 stars 2 stars 3 stars 4 stars 5 stars
44.95 In stock