I just received a sample kit of a CO Sensor solution from TI. If you need to design-in a CO/chemical/gas sensor with Bluetooth for a home, commercial or industrial setting, this solution could be a good fit.
It’s almost an out-of-the box implementation of a complete sensor with processor and Bluetooth transmission.
The LMP91000 also features near complete configuration via an I2C port and has an external reference voltage input. The AFE Potentiostat can be used with either 2 or 3-wire sensors.
This device could be used in any low-power battery-operated design to reduce battery usage while providing reliable power to your circuit. The bypass mode allows you to get maximum life out of the batteries used.
This chip has plenty of flash and ram for applications, plus 23 I/O, a 12-bit ADC and a UART. It could be used in any application where you need a SOC with Bluetooth connectivity.
The CO sensor solution is an excellent reference design for a Bluetooth CO sensor, but some external circuitry is required and some programming. It runs on 1.8-3.6v, features ultra low-power consumption, and uses a versatile configurable AFE.
The range available with Bluetooth might be a problem in some cases; if range is a problem you might look at the Chemical/Gas Solution, it is almost the same circuit with a 4-20ma current transmitter output. With the CO sensor's configurable AFE, you could interface a variety of sensor types to this design.
There are application notes and reference designs [ here or on TI's site] for most of the components used. But don’t think that TI engineers have done all of your work for you - most of the proposed designs still require some design time for external circuitry and programming for configuration. You can go to the TI web site to download a sample kit.