If your sensor is an appreciable distance from your amplifier, you should definitely use an instrumentation amp. They have superior common mode rejection over anything you can build. The sensor leads will almost certainly pick up common mode noise, which, in your circuit, will be converted to differential noise, which may be higher than the signal amplitude.
The sensor has 5 second response time, so the 1kHz bandwidth of the INA326 is more than adequate. In fact, you might want to add filtering on the output, although you can probably do that in software.
The sensor has 5 second response time, so the 1kHz bandwidth of the INA326 is more than adequate. In fact, you might want to add filtering on the output, although you can probably do that in software.