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Detector Building

Detector Building

Teams will build a durable ORP or Redox Probe that will accurately measure and display both voltage and the concentrations of NaCl in parts per million from 0 to 5000 ppm of different water samples.

Regional Location
Eye Protection
Rules Location
States Only
Type C
National Rulebook
Mar 31, 2024

Add Section 2.e.: Participants must wear goggles, an apron or a lab coat, and have skin covered from the neck down to the wrist and toes. Pants should be loose fitting. Shoulder length or longer hair must be tied back. Participants removing safety clothing/goggles or unsafely handling materials or equipment will not be allowed to participate in device testing. PPE is not required for the written test.

Feb 19, 2024

Section 3.g.: The Device must have a digital display that clearly shows voltage, and salt concentrations in ppm to the nearest unit value. (PPM is defined as mass/volume or mg solute/ liter solvent) 

Oct 16, 2023

VASO considers writing code to be an integral part of building a device, so the Construction Policy applies to the code as well as the physical device. To ensure this policy is followed, teams will be required to transfer a copy of their source code file (after they modify it during the setup period) onto a USB flash drive provided by the Event Supervisor. The team is responsible for ensuring they will have a way to connect the provided USB flash drive to their laptop or calculator.

Oct 16, 2023

Section 4.e.: All logs will be returned to teams after inspection. Teams are encouraged to have a duplicate of their Design Log, as the submitted copy may not be returned.

Sep 18, 2023

Section 2.a.: Each team may bring one participant-constructed, ORP or Redox probe with a laptop or a stand-alone calculator for programming/display, two stand-alone calculators of any type, and ...

Sep 5, 2023

This event will not be held at VASO regional tournaments. It will be held at the State tournament.


SO Personal Protective Equipment
Download PDF • 1.69MB

Detector Building C VASO Checklist
Download PDF • 110KB

VASO Detector Building Scoring Spreadsheet

Build Modularly
Download PDF • 149KB

National Detector Building page

Student Resource Center (Scioly)

Significant Figures Guidelines

Resources from the 2022-23 Season

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