BE2400: Noninvasive Biomass Multiplexer (up to 4 sensors)

BE2400 Multiplexing Base Unit for BE2100 Sensors

Non-Invasive Biomass Monitoring System

Read up to Four BE2100 Sensors

The BE2400 base unit accommodates up to four BE2100 noninvasive optical biomass sensors (sold separately). Sensor readings can be viewed on the fluorescent display either sequentially (automatically scrolling), or the display can be locked to a specific sensor. New sensors are automatically detected as they are plugged in. Operational parameters for each sensor can be individually adjusted through the keypad interface.

Software Included

The BE2400 also allows you to communicate digitally with up to four BE2100 sensors using a single interface cable (either USB or RS232), enabling straightforward integration into a fermentor or bioreactor control system or connectivity with a computer. The included software program provides intuitive controls and the ability to track growth in real time. Five tab-indexed graphs allow results to be viewed for each individual sensor or all sensors overlaid. The software can also calibrate the sensors to any desired units (OD, g/L, cells/mL, etc.) as well as track important events (e.g. inoculation, nutrient additions).

Simple Command Set

As an alternative to running the standard computer program, a well-documented serial command set is provided for communicating with each sensor using simple commands. The commands can be called from within any other computer program or control system that has the ability to send and receive serial commands. This makes it easy to integrate the BE system with other instrumentation. A LabView® instrument driver is also available on request.

Analog Output

Four analog outputs at the rear of the BE2400 base unit provide signal currents (4-20 mA) proportional to the reading of each sensor. The correspondence between the analog output and the sensor measurement is adjustable (using the “range” setting). The six logarithmically-spaced settings span range values from 0.01 to 1000. The analog output can be easily converted from current (4-20 mA) to voltage (2-10 V) using provided resistors.

Non-Invasive Biomass Monitoring System

BE2400 Base Unit Features

Base Unit Features

Access to individual sensor and base unit settings through interactive keypad
Password control (optional) of keypad access
Lighted display with variable brightness control
Digital (USB and RS-232) and four analog (4-20 mA or 2-10 V) outputs (biomass and growth rate)

User Interface Software Features

Real-time graphical and numerical display for each sensor
Event marking on graph, both pre-defined and user-defined
Baseline setting and subtraction
User calibration of sensor output to any reference units
Access to all sensor and base unit settings

User Interface Software Requirements

Windows XP/ Vista / 7 Operating System
Available USB or 9-pin RS-232 COM port
Minimum 200 MB free hard disk space
CD reader (required only at time of software installation)

BE2400 Base Unit Specifications

BE2400 Base Unit Electrical Specifications
DC Power In:	9 V, 1000 mA
Certifications:	CE marked Tested for compliance to EMC standards EN55011 and EN61000, and safety standard EN 61010
Sensor Input:	up to 4 BE2100 sensors
Sensor Connector:	BE2100 sensor, female (4-wire, threaded)
Analog Output:	4-20 mA (500 Ω max.) or 2-10 V (using provided 500 Ω resistors)
Resolution:	12 bits (0.004 mA or 2 mV)
Range Settings:	6 settings, logarithmically spaced: 0.01-1000
Number of Analog Outputs:	8 (‘+’ and ‘–‘ screw terminal positions for sensor signal and exponential growth rate)
Digital Output:	RS-232/DB9 and USB
Communications Cable Connector:	DB9 (M/F) or USB (A/B)
Communications Cable Lenght:	Standard: 2000 mm Custom: up to 15000 mm
BE2400 Base Unit Physical Specifications
Overall Width:	159 mm
Overall Length (without connectors)	132 mm
Overall Height (without feet)	82 mm
BE2400 Base Unit Environmental Specifications
Operating Temperature	0 to 40°C
Operating Environment	Dry locations only