Define ToolBox
Smart, simple software to program your Merlin, Twin Link or transmitter
Version 1.7.5 (November 19, 2023, 43MB)
Bridge Key Required!
In addition to this software a Bridge Key is required for the configuration of this product.
You must order one unless you already have one from a previous product purchase.
Simulation Mode
Simulation Mode allows you to simulate any ToolBox-compatible product:
- Demonstrate or experiment with configuration settings.
- Configure inputs, outputs and setpoints
- Save and export your simulated configuration
All without connecting to a physical unit!
This feature enables a support agent to mirror your application, troubleshoot your setup, then email you the correct configuration, for fast remote assistance with no need to courier the product back and forth.


Simple & Flexible Input/Output Setup
Define ToolBox offers a range of flexible features – with easy selectable defaults for the novice user, and advanced options for the expert:
- Selectable pre-calibrated ranges, for easy setup and scaling without a calibrator.
- Automatic or manual output scaling.
- Linearization tables for complex scaling – perfect for unusual tank shapes
Simple & Flexible Input/Output Setup
Define ToolBox offers a range of flexible features – with easy selectable defaults for the novice user, and advanced options for the expert:
- Selectable pre-calibrated ranges, for easy setup and scaling without a calibrator.
- Automatic or manual output scaling.
- Linearization tables for complex scaling – perfect for unusual tank shapes

Versatile Setpoint Modes
For compatible products with Setpoint features, ToolBox offers a wide range of setpoint modes.
Whether you need simple Alarms and On/Off Controls, or application-specific Dual-Setpoint Modes for heating and cooling equipment or pumps, ToolBox has a simple, selectable option to suit.


Help Sidebar
ToolBox tracks your progress as you set up your unit, displaying relevant information, wiring diagrams, and examples of use.
Not sure what a feature is for or how to configure it? Simply click on the control button, text box or label, and all of the information that you need will appear in the panel on the right.
Help Sidebar
ToolBox tracks your progress as you set up your unit, displaying relevant information, wiring diagrams, and examples of use.
Not sure what a feature is for or how to configure it? Simply click on the control button, text box or label, and all of the information that you need will appear in the panel on the right.

Import or Export your Settings
It’s now easy to back up and restore your setup, using ToolBox’s easy Import/Export feature. Use it to:
- Clone a configuration.
- Save a restore point before making changes.
- Email setup files for support and troubleshooting.


Configuration Certificate
The Configuration Certificate is a formatted summary of all settings and wiring diagrams for the connected unit, presented in PDF format for easy printing, saving and sharing.
Designed for distributors, the certificate is ideal for dispatch with a pre-configured product, and offers customisable fields for support information.
Configuration Certificate
The Configuration Certificate is a formatted summary of all settings and wiring diagrams for the connected unit, presented in PDF format for easy printing, saving and sharing.
Designed for distributors, the certificate is ideal for dispatch with a pre-configured product, and offers customisable fields for support information.

Get Define ToolBox
Version 1.6.6 (Jul 18, 2017, 41MB)
Need Help?
Please visit our Support Portal to get help with a problem, or suggest a new feature.
Specifications
General Specifications
Skill level Suitable for all users. Easy to install and use.
Current version V1.7.5 (November 19, 2023)
System Requirements
Operating system Windows 7/8/10
PlatformRequires the .NET framework (pre-installed on most computers – the installer will prompt you if .NET 4.7.2 is not detected on your computer). Download .NET 4.7.2
Release Notes
Date of release:
19 November 2023
System requirements:
– Operating system: Windows 7/8/10
– Platform: .NET 2.0 framework.
Additions:
Fixes:
– Some wiring diagrams not shown or incorrect.
Date of release:
31 October 2023
System requirements:
– Operating system: Windows 7/8/10
– Platform: .NET 2.0 framework.
Additions:
Fixes:
– Not saving analog output scaling when switching between °C/°F temperature modes.
– Not showing wiring diagram for some transmitters.
Date of release:
18-Jul-2017
System requirements:
– Operating system: Windows 7/8/10
– Platform: .NET 2.0 framework.
Additions:
– Support for Sentry no display build.
– New head mount transmitter wiring diagrams in help.
Fixes:
– Incorrectly sized analog output help image.
– P2P input -200mV to 1V range changed from 3 to 4 decimal places to correct scaling issue.
Need Help with this Software?
Our highly experienced engineering team can be reached via our Support Portal. Please create an account to:
- Submit a support ticket or
- Suggest an improvement to this software