Wireless Drop Counter (NS)

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Product Code: 0134



Titration experiments are core to any chemistry curriculum – now conducting a titration has never been easier! The Wireless Drop counter counts drops of titrant added during a titration and converts the drops into a volume. Use the Wireless Drop Counter, with a Wireless pH sensor, Wireless Temp sensor or Wireless Conductivity Sensor to easily perform potentiometric, thermometric and conductometric titrations.


  • Measures up to 10 drops per second
  • IR Filter assures accurate counts because room lighting cannot affect results
  • Sensor unit can suspend up to two other probes in solution, simplifying many experiments
  • Wider drop window (18 x 13 mm) means better drop detection and easier alignment with burettes
  • Splash resistant design to keep it safe from harm in wet labs
  • Automatically recalibrates for maximum sensitivity each time the unit is turned on.
  • LED drop indicator makes setup and testing easy
  • Long-lasting rechargeable battery (>200 hours on a single charge)
  • Included materials make it easy to set up a drop dispenser and easily control drop size and flow

What’s Included

  • 1x Wireless Drop Counter
  • 1x Micro Stir Bar
  • 1x Drop Dispenser with Stopcock
  • 1x Plastic Dispenser Rod Clamp

Typical Applications

  • Titration
  • Investigating indicators
  • Chemical reactions
  • Counting drops and measuring volume

Includes a Micro Stir Bar for even better titration data. The Micro Stir Bar connects to the end of your pH or Conductivity probe and maintains a constant constant flow of solution over the end of the electrode. Works with a standard stir plate. (Additional Micro Stir Bars are also available separately.) It also includes a Drop Dispenser plus a stainless steel rod for easy attachment to a ring stand.

Product Specifications

Maximum Drop Count Rate 10 Drops/ second
Exterior Case Made From ABS
Optical Window Made From Acrylic

Battery and Logging

Stored Data Points Memory (Logging) 1 Not Supported
Battery – Connected (Data Collection Mode) 2 >260 hr
Battery – Logging (Data Logging Mode) 3 Not Supported
Battery Type LiPo

1 Minimum # of data points with all measurements enabled, actual results depend on enabled measurements.

2 Continuous use in a connected state until battery failure, actual results will depend on sample rate, active measurements, and battery condition.

3 Logging until battery failure, actual results will depend on sample rate, active measurements, and battery condition.

* Normal classroom use is the sensor in active use for 20min/lab for 120 lab periods/yr.


Perform the following experiments and more with the Wireless Drop Counter.
Visit PASCO’s Experiment Library to view all activities for this product.

Shape Of Titration Curves

Students use a pH Sensor and drop counter to determine the fundamental shape of a titration curve and the parameters that can cause it to change.

Titration Curves

Students will use a pH sensor and a drop counter to explore the shape of a titration curve produced by a strong acid and a weak acid when titrated by a strong base.

Measuring Vitamin C – Redox Titration

In this lab, students use an oxidation-reduction potential probe to expand their understanding of titrations, carry out a redox titration, and then use the redox titration method to answer a question of their own design.

Weak Acid Titration

In this lab, students will use a drop counter and pH sensor to titrate monoprotic and polyprotic weak acids. Then they’ll determine the relationship between the shapes of the curves and Ka.

Stoichiometry Of Solutions

In this lab, students use a drop counter, conductivity sensor, and a temperature sensor to determine the concentration of dissolved ions by titration.

Diprotic Titration: Multi-Step Chemical Reactions

In this lab, students will use a drop counter and pH sensor to determine the concentration of a sodium carbonate solution. Students will learn that chemical reactions can be the sum of several individual reactions.

Supporting Documents

Wireless Drop Counter Reference Guide English 1.60 MB