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The Dissolved Oxygen Probe is great for biology, chemistry, ecology, or integrated science courses. It can be used to perform a wide variety of experiments to determine changes in dissolved oxygen levels, one of the primary indicators of the quality of an aquatic environment.
Description: GSM CONTROL SYSTEM Model : GSM-840 * Control/Alarm via GSM mobile phone, with no distance limitation. * 8 switch inputs, 4 relay outputs. * GSM mobile phone can control the relay output and sensing the input switch's status with alarm. * It can default two telephone no to send warning SMS. * Features : Intelligent , innovation, wide range, control with no distance limitation.
Description: GSM CONTROL SYSTEM Model : GSM-888 * Control/Alarm/Monitor via GSM mobile phone, with no distance limitation. * 8 channels A/D (4 -20 mA), 8 relay outputs, 8 switch inputs. * 8 channels A/D , can cooperate full line industrial 4-20 mA transmitters and display the real value and the display unit on mobile phone. * Analog channel alarm warning setting. * It can default two telephone no to send warning SMS. * Features : Intelligent , innovation, wide range, control with no distance limitation.
Description: GSM CONTROLLER, 900/1800 MHZ Model : GSM-889 * Control/Alarm/Monitor via GSM mobile phone, with no distance limitation. * 8 channels RS232 input, 8 relay outputs, 8 switch inputs. * 8 channels RS232 input can cooperate full line LUTRON instruments (build RS232 output), it will display the real value with the measuring unit on mobile phone. * Analog channel Hi/Lo alarm warning setting. * Interface cable ( meter to GM-889 ), Model : GMCB-89. * Application : Intelligent , innovation, wide range,no limitation. * 3 band (850/1800/1900 MHz) for American market
Description: WIRELESS DETECT SWITCH Model : DS-121 * DS-121 is the standard accessory and the optional accessory of GSM-120. * Two wireless detect switches (DS-121) are included in each set of GSM-120. * User can install the DS-121 on the door or window easily. When the thief interrupt the house, buzzer will sound and send the SMS alarm message to the mobile.
Features * 32/16 Input Channel * Time Analysis : Up to 200MHz Internal Sampling Rate * State Analysis : Up to 100MHz External Input Clock * Memory Depth : Up to 2Mbits/1Mbits (Half/Full Channels) * Enable Qualifier : High/Low Level Enable and Enable Delay Function * Signal Analyzer : I2C, RS-232C Protocol Analyzer and Signal Statistics * File Export : Signal Data, Operation Setting and Display Image * USB 2.0 Supported(1.1 Compatible)
Features * Application for GDS-3000 demo and oscilloscope training* 5Vdc Power Input (Support USB Power, interface Type B)