Angerole, Inc manufactures these practical and rugged air temperature sensors. Originally designed for racing applications they have limitless uses wherever it is important to know and record air temperature.

The close-up below shows the sensor head next to a US quarter. We would like to draw your attention to this sensor's compact size (1/2" diameter), proper strain relief and ty-rap retaining groove. It's easy to put the sensor where you need it, easy to clip it down once there and it's hard to rip the wires out.

Note also the fins to increase surface area and the polished finish: this sensor measures air temperature, not radiant heat.

Unlike production automotive sensors, this has a lead wire so the connector of your choice can be placed in a convenient spot: you don't have to find room for a bulky OEM plug right next to where you want to take a measurement. Our lead wires are wound from 24 gage aviation grade Tefzel wire with Raychem DR25 sleeving. The photo below gives some idea of how flexible this is.

Using only 3 wires, and taking less than 1mA at 5V, these convenient and useful sensors provide a voltage level output directly proportional to temperature. This makes them easy to interface with any data acquisition system or engine management unit.

AIR TEMPERATURE SENSOR CALIBRATION

°C	°F	VOLTS	10 Bit	12 Bit	16 Bit

150	302	5.00	1023	4095	65535
140	284	4.75	972	3890	62258
130	266	4.50	921	3686	58982
120	248	4.25	870	3481	55705
110	230	4.00	818	3276	52428
100	212	3.75	767	3071	49151
90	194	3.50	716	2867	45875
80	176	3.25	665	2662	42598
70	158	3.00	614	2457	39321
60	140	2.75	563	2252	36044
50	122	2.50	512	2048	32768
40	104	2.25	460	1843	29491
30	86	2.00	409	1638	26214
20	68	1.75	358	1433	22937
10	50	1.50	307	1229	19661
0	32	1.25	256	1024	16384
-10	14	1.00	205	819	13107
-20	-4	0.75	153	614	9830
-30	-22	0.50	102	410	6554
-40	-40	0.25	51	205	3277
-50	-58	0.00	0	0	0

While we have included signal voltage and counts for 10, 12 and 16 Bit A to D converters at 10°C intervals, the linear output from these sensors means that typically you would only need to enter two points in your system calibration.

Naturally, thermal mass causes any temperature sensor to lag a change of the temperature of the air that surrounds it. Angerole, Inc air temperature sensors are a deliberate balance between physical ruggedness and response time. Here's a graph of one of these sensor's response to a 100°C step change in still air temperature. It is important to note that response is much faster in a moving air stream, for instance a radiator exit duct.

These sensors are available now from Angerole, Inc for $99 each including shipping by US Mail in the Lower 48. For different shipping services and/or destinations outside the continental US, please email us for a quote.

If you're ready to purchase, please feel free to use the shopping cart buttons below or we'll be happy to take credit card details over the phone at the number on our Contact page.