I, along with several other people, have been predicting the arrival of "lick and stick" sensors-- very inexpensive wireless sensors capable of being used in many industrial and building automation applications. Here's a press release from Omega Engineering that makes my case. Note the price.OMEGA Introduces Thermocouple Wireless Connector and Data Logger
Omega’s new MWTC-D Series of Miniature Portable Wireless Thermocouple Connectors and data logger records over 65,000 process temperature data points and are available in standard J, K, T, E, R, S, B, C, or N thermocouple calibration.
Each battery powered, compact connector transmits and/or records process & ambient temperature data back to a mating wireless receiver up to 90 m (300’) away. All readings are displayed on your PC screen in real time using the free provided software.
The recording can begin either at power up, or at a pre-set time & date. Multiple wireless connectors (Up to 48 units) can transmit to one MWTC-REC receiver.This product is used in chemical, automotive and oil & gas industries to monitor and log any temperature process over a period of time as well as send the temperature data wirelessly to a receiver.
Price Starts at $150