HM Electronics Coral Doser – 4 Head


3 in stock


HM Electronics Coral Doser – 4 Head

The Coral Doser is a newly developed peristaltic dosing pump, where creativity in design and engineering has been applied to the all-important dosing requirement in our reef and freshwater aquariums. The stepper motor driven Coral Doser has software that enables super precise motor ‘micro stepping’ to deliver a ridiculous 1/80,000th of a rotation for infinitely small doses.

The Coral Doser can be used for typical dosing of aquarium chemical solutions, is programmed with an iOS or Android app, and the built-in ports can receive one or two optical water level sensors for use as an Auto Top Off device (optional).

The HM Electronics team has worked hard to make the Coral Doser a very robust aquarium device with many water resistance and moisture barrier features so that it can be used in very humid environments.

View the Product Release Video Here


Ultra Precision – Precision DC stepping motor with micro stepping controlled technology achieves accuracy of ±0.05ml (<5ml) and ±1% (>5ml) or 0.4% (>5ml) mean deviation.

Long-term accuracy and stability – The stainless steel ball bearing roller and stepper motor can keep exactly the same accuracy after dosing 60000ml.

Wide range of dosing capability – Automatic rapid water changes or adding additives continuously and slowly in the dosing range 0.1 ~ 105ml/min.

Cost savings for Pipes – Ultra-low friction design ensures tube life up to 1 year (200ml/day).

Calm – Quiet operation over the entire speed range.

Easy to maintain – The tube can be easily replaced without tools.

Smart application:

  • Automatic pairing and grouping of multiple dispensers
  • Freely adding multiple dosing time periods with different dosing
  • Automatic programming
  • Prevent chemical interaction
  • Historical record for 28 days
  • Stirring function
  • ATO function
  • Automatic water change function
  • Automatic notification when the additive is about to run out

Optional stirrer:

  • Works with HME Stirrer to stir automatically before dosing
  • You don’t need an extra power adapter
  • You can select 3 stirring speeds

Optional level sensor:

  • Coral Doser can connect with two water level sensors
  • Two separate sensors, double reliability
  • Top up slowly and accurately
  • Enables you to maintain water quality


Easy – simple way to set a daily dose betwen a start and end time

  • Set a start and end time
  • Set an interval between each dose
  • Choose the amount of ml per dose
  • Set the rate (ml/min)
  • A summary shows the total dail dose and number of times per day.

Expert – set one to multiple doses, each at a specific time and dose

  • Set the amount of ml to dose
  • Choose the time for the dose
  • Set the rate ml/min
  • Use the + button to add another dose time


  • Model: Coral Doser P4
  • Dosing Heads: 4
  • Adapter: 12V/5.0A X1
  • Dimensions (mm): 72 H x 72 W x 67 L (4x Coral Doser P1)
  • Accuracy: ±0.05ml(<5mL),±1%(>5mL)
  • Average deviation: 0.4%(>5mL)
  • Dose Rate: 0.1~105ml/min
  • Daily Dosage: 0.1~2000ml/day
  • Input voltage: 100~240VAC,50/60Hz
  • Tubing connection:  4mmID,6mmOD