Accurately measuring the temperature of a monolayer at the air-water interface is not straight forward. When a trough is being heated from beneath the trough face and the air above the monolayer is at a lower temperature, there exists a temperature gradient. Somewhere between the two extremes of temperature is the temperature of the monolayer.
Nima have developed a temperature sensor, designed to be submerged into the Langmuir or LB Deposition Trough to a depth of 4mm. This corresponds to the optimum water depth of all Nima troughs so the sensor simply rests against the trough face. The end of the sensor is PTFE terminated to prevent scratching of your trough face.
The sensistive semiconductor temperature sensor device is encapsulated within a 0.5mm wall thickness steel tube, allowing the thermal conduction properties of the device to be an intermedite value between the extremes of subphase and air temperatures.
If you wish to redifine the monolayer temperature, to be more of a component of the air temperature, a simple adjustment of the submersion depth will modify the temperature reading. Repeatability of the measurements is perhaps of greater impotance to you, so consistency of submersion depth should be maintained. The temperature sensor is provided with a mini-clamp to hold the device in place during your experiments.
The sensor is connected using the cable provided to your existing Nima Computer Interface Unit and operates in conjunction with your Langmuir or LB Deposition Trough.
Temperature sensor operating range: 0-100oC
Accuracy: +/- 0.1oC
For further information on heating your Langmuir trough, please visit the FAQs section of the website.
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Temperature Sensor product code: TMP.
