QM20-2-S-I
Thickness gauges from the QM20 series, in standard resolution , RS485 interface and dual built-in oscillator.
It does not require external oscillator.
QM20-2-S-I / RS232 / Standard Resolution
The QM20 combines simplicity of operation with unrivalled accuracy in a compact form factor, delivering precise measurements at 0.1Hz resolution. In addition, this unique instrument boasts two independent measurement channels and also features ModBus protocol for implementation in both laboratory and industrial applications alike.
Perfect performance
The QM20 represents one of the highest accuracy and most cost effective solutions on the market when taking into account the independent dual measurement channels and 0.1Hz resolution figure. The high resolution enables a deposition layer thickness measurement which is accurate to just 0.012 A (density = 1). There is no other low-cost compact unit on the market to match it.
Easy installation
The QM20 is delivered as a complete package with 2.5m long communication cable and external power supply as standard. Other combinations are possible on request. Simple LED indicators immediately show the connected crystal status.A wide range power supply voltage and low power consumption make the device environmentally friendly and expand the possibilities for powering - especially useful in industrial applications.
Software
The QM20 includes QM20 soft Windows and macOS platform software which is capable of simple operations and data logging for up to 253 units with RS232 interface. All service operations can be performed via the QMS20soft interface, including IP address setting, factory parameter restore and firmware upgrade. QM20soft also regularly and automatically checks for available upgrades, ensuring the end user always has the latest available firmware.
Key Features:
Measurement Precision
Delivers perfect performance with an outstanding 0.1Hz resolution. This extremely high accuracy enables precise deposition layer thickness measurements down to just 0.012 Å (Angstroms).
Dual-Channel Capability
Features two completely independent measurement channels with support for two crystals simultaneously. It also includes support for an external oscillator, providing unmatched flexibility in its class.
Advanced Software & Data Logging
Includes QM20 soft (compatible with Windows and macOS) for seamless operation and data logging for up to 253 units. It automatically checks for updates, ensuring your firmware is always up-to-date.
Versatile Connectivity
Designed for both laboratory and industrial applications, the unit comes equipped with an RS 232 interface and full support for the ModBus protocol, allowing for straightforward integration into existing systems.
Plug-and-Play Installation
Delivered as a complete package including a 2.5m communication cable and an external power supply. Simple, built-in LED indicators provide immediate visual feedback on the connected crystal status.
Compact & Eco-Friendly Design
One of the most cost-effective solutions on the market, combining a highly compact form factor with low power consumption and a wide power supply voltage range, making it exceptionally environmentally friendly.
Technical Specifications:
Frequency Resolution | 0.1 Hz at 10 reading/s |
Measurement Interval | 0.1 s to 2 s |
Quartz oscillator type | 6 MHz |
Reference frequency stability | 0.5 ppm |
Sensor inputs | 2 |
Built-in oscillator | Yes, two channels |
External oscillator support | Yes, two channels |
Input type | female BNC |
Interface | RS232 |
Protocol | Modbus RTU |
Supply & Interface connector | removable, screw terminal block, 3.81 mm spacing |
Supply voltage | 12 - 24 V DC |
Supply Current | max 250 mA |
Usage | Use indoors only |
Storage temperature | -20°C - 50°C |
Operation temperature | 15°C - 40°C |
Relative humidity | Max. 80% (up to 31°C), decreasing to max. 50% (above 30°C) |
Altitude | Up to 2000 meters |
Pollution Degree | 2 |
Dimensions | 26.0 x 61.3 x 106.5 mm |
RS cable length | 2.5 m |
Weight | 126 g |
Operating system | Windows 10, Windows 8, Windows 7, Windows Vista, Windows XP or Windows 2000 |
USP Port(s) | One USB 1.1 (or later) port for each QM20 |