I have a pt100 probe to monitor the temperature of water pipes. what do i need to hook up the three wires to to see the to see the temperature?

Attach your 100 ohm Platinum RTD to the 3 screws closest to the middle (The two wires of the same color attach as shown on the sticker found on the transmitter). Now connect +24V to the "+" screw. Attach a resistor (200-250 0hms) to the "-" screw. Connect the -24V to the other side of the resistor. As the temperature of your RTD varies from -50 to +100C your resistor will get 4 to 20mA. Use ohms law. If your resistor is 250 ohm, you get 1 to 5 V. If your resistor is connected across the two input screws of a process meter, the meter will read "-50C" to "100C" for minor adjustments, there is a "zero" and "span" on the transmitter.

What are the two adjustment potentiometers for?

One is the offset adjustment and one is the range adjustment. They have icons to show which is which. The offset should be set so that you get a zero degrees C reading with iced water. Then the range should adjusted so that you get 100 with boiling water. You may have to go back and adjust the offset and repeat until you get 0-100

Will this transmitter work properly with a 12V power supply?

Specs say +24VDC and that's what I used to power the sensor and transmitter. At +12VDC your range would be 2mA to 10mA (partial range unusable below 4mA) rather than the standard 4 - 20mA full temp range. I would search for a +5VDC transmitter and regulate the +12VDC to +5VDC.

ASIN	B07RFCM7TX
Best Sellers Rank	#201,409 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #497 in Temperature Probes & Sensors
Brand	TWTADE
Current Rating	20 Milliamps
Customer Reviews	4.6 4.6 out of 5 stars (35)
Date First Available	May 4, 2019
Item Weight	0.81 ounces
Item model number	-0-100℃
Manufacturer	TWTADE
Manufacturer Part Number	-0-100℃
Material	Plastic
Maximum Supply Voltage	24 Volts (DC)
Measurement Accuracy	±0.2°C
Mounting Type	Integrated
Output Type	Analog
Package Dimensions	3.8 x 2.6 x 0.5 inches
Style	Modern
UPC	789659498764
Upper Temperature Rating	100 Degrees Celsius

TWTADE / 0~100 Celsius RTD PT100 SBW Temperature Sensor Temperature Transmitter Isolated Detector Module 0~100 Degree - 4-20MA

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