Patent ID: 8248611

Claim:
A handheld optical measuring device, comprising: a handheld controller module comprising a housing comprising a bottom surface, the housing adapted to be held by a user's hand, a controller positioned within the housing, the controller adapted to calculate an optical property of a water sample based on an optical sensor signal, and an immersible sensor head comprising a housing comprising a proximal end and a distal end between which extends a length of the sensor head, the sensor head being connected to the bottom surface of the controller module housing at the proximal end of the sensor head housing, and at least one optical sensor coupled to the controller, the optical sensor adapted to generate and transmit the optical sensor signal to the controller based on the optical property of the water sample when the sensor head is immersed in the water sample; and a sampling member comprising a sample cup for containing the water sample, the sample cup being removably fastenable about the sensor head such that the water sample can be introduced into the sample cup when the sample cup is not fastened about the sensor head and such that at least a portion of the sensor head is immersed in the water sample when the sample cup containing the water sample is fastened about the sensor head, and an attachment member coupled to the sample cup and the handheld controller module for retaining the sample cup with the handheld controller module whether or not the sample cup is fastened about the sensor head.