Normalab Chronotech Electronic Stopwatch for Viscosity Tests

A software stopwatch that calculates kinematic viscosity

The Chronotech is a Normalab electronic chronometer built for kinematic viscosity measurements. Instead of timing the flow of a liquid through a capillary tube with a hand stopwatch and then multiplying by the tube constant on paper, the operator enters the tube constant once and the Chronotech calculates the viscosity and shows it on the touch screen. Three measurements can run at the same time, so a three-tube bath can be handled by a single operator.

Normalab lists the Chronotech under ASTM D445, ASTM D446 and IP 71. The leaflet describes it as a software-based stopwatch that is mobile and easy to handle, and the NVB Classic viscosity bath leaflet lists it as an optional accessory with part number 41900.

Technical specifications

What is delivered and how it is used

The Chronotech is delivered with the portable stopwatch, its charging dock and a power adaptor; the web page lists a charging station and power adapter. There is no separate option list. The portable unit can be carried to the bath and used next to the viscometers, and position markers make it easy to assign each stopwatch to a tube position.

Typical use is a viscosity laboratory with a thermostatic bath such as the Normalab NVB Classic: the operator draws the sample into each viscometer, waits for temperature equilibrium, then starts the timer when the meniscus passes the upper mark and stops it at the lower mark. With the tube constant stored, the result appears at once, which removes transcription errors and calculation steps. Because the stopwatch is portable, it also suits laboratories that move between several baths or want one timing device shared by a team, and the charging dock keeps it ready between shifts.

What to confirm before ordering

The Chronotech is an accessory, not a bath or viscometer, so confirm that it suits the number of tubes you time at once, that the tube constants you use can be entered, and that a mains outlet is close to the charging dock. Battery autonomy is stated as 3 to 4 hours in the leaflet and 3 hours on the web page, so plan charging between long sessions. Browse related liquid analytical systems.

Enter the tube constant for every viscometer carefully, and keep a printed list of constants beside the bath, so that each of the three stopwatches is always matched to the correct tube position.

Related Normalab products: Normalab NVB Classic Kinematic Viscosity Bath, Normalab NPV Tech Small-Scale Closed-Cup Flash Point Tester, Normalab ARV Tech Air Release Properties Tester for Oils, Normalab DEM Tech Semi-Automatic Demulsibility Tester, Normalab NPM Tech Semi-Automatic Pensky-Martens Tester and Normalab NCP Tech 2 Heated Centrifuge for Water and Sediment.

Documents and quotation

The Normalab Chronotech leaflet is attached. Send the number of tubes and bath type for a quotation; availability and lead time are confirmed before ordering.