Lm35dz temperature goes down with increase in heat

Other Hardware Sensors
1

Greetings:
I have an Arduino Uno with an LM35DZ connected to A2. The LM35DZ is powered from the +5v of the Arduino board. The temperature reading is close to what I would expect, but when I hold the sensor between my fingers, the temperature calculation goes down, and when I release it, the calculation goes up, as if the voltage output is inversely proportional to temperature instead of directly proportional.
Is this supposed to be?

CurrentTempC = analogRead(A2) * 5.0 / 1024.0 * 100.0; //0.01v/C
CurrentTempF = round((CurrentTempC * 9.0 / 5.0) + 32.0);

if (digitalRead(XMT))
{
Serial.print("temp: ");
Serial.print(CurrentTempF);
Serial.println(" F");
}

Anyone have any ideas?

2

Anyone have any ideas?

Yes.

Read 'how to use this forum - please read' again, but more carefully the second time, then go back and modify your original post along with the guidelines shown.

You are more likely to get helpful, friendly answers that way.

3

There's been a rash of counterfeits lately, plain TO92 transistors relabeled LM35, but that don't make sense if it reads ambient temperature correctly. What does your DMM show (should be close to 10mV / degree C, 250mV for 25C). Do you have a spare to try? Where did you get them?