ZTP-135 Thermopile IR Sensor

Product Overview

The ZTP-135 is a thermopile infrared sensor designed for non-contact surface temperature measurement. It integrates thermo-elements, a flat IR filter, and a thermistor for ambient temperature compensation, all housed within a hermetically-sealed, small-size package. Available with various filters to optimize performance for specific applications, the ZTP-135 offers high sensitivity, a fast response time, and a wider surface area measurement capability, making it suitable for patient monitoring, ear and tympanic thermometers, occupancy detection, HVAC systems, and appliance temperature sensing. Its low cost and included ambient temperature sensor contribute to its versatility and ease of integration.

Product Attributes

• Brand: Amphenol Advanced Sensors
• Model: ZTP-135

Technical Specifications

Thermopile Chip

Parameter	Limits	Units	Condition	Min	Typ	Max
Chip Size		mm			1.8 x 1.8
Diaphragm Size		mm			1.4 x 1.4
Active Area		mm			0.7 x 0.7
Internal Resistance		kW	25C	42	60	78
Resistance T.C		%/C			0.12
Responsivity		V/W	500K, 1 Hz	42	60	78
Responsivity T.C		%/C			-0.10
Noise Voltage		nV rms	R.M.S., 25C		32
NEP		nW/Hz	500K, 1 Hz		0.53
Detectivity		cmHz/W	500K, 1 Hz		1.30 E08
Time Constant		ms			25

Thermistor for Temperature Compensation

Parameter	Limits	Units	Condition	Min	Typ	Max
Resistance		kW	Tol. :3%, @25C	9.7	10	10.3
Beta - Value		K	Tol. :1%, Defined at 25C/85C	3930	3970	4001

Absolute Maximum Ratings

Parameter	Limits	Units
Operating Temperature	-20 to 100	C
Storage Temperature	-40 to 120	C

Thermistor Resistance (R-T Table)

T ambient ( C)	Rmin (kW)	Rcent (kW)	Rmax (kW)
-40	267	284.7	303.2
-35	197.2	209.6	222.5
-30	147.1	155.9	165
-25	110.8	117.1	123.6
-20	84.16	88.68	93.35
-15	64.46	67.73	71.11
-10	49.74	52.13	54.59
-5	38.65	40.41	42.21
0	30.24	31.543	32.86
5	23.81	24.772	25.75
10	18.86	19.58	20.3
15	15.03	15.56	16.1
20	12.04	12.44	12.84
25	9.7	10	10.3
30	7.823	8.082	8.342
35	6.342	6.566	6.791
40	5.168	5.361	5.557
45	4.233	4.4	4.569
50	3.484	3.629	3.776
55	2.882	3.007	3.135
60	2.396	2.504	2.615
65	2.0009	2.095	2.192
70	1.679	1.7612	1.8458
75	1.4153	1.4871	1.5612
80	1.1984	1.261	1.3264
85	1.0193	1.0745	1.1317
90	0.8707	0.9193	0.9697
95	0.7469	0.7898	0.8344
100	0.6433	0.6812	0.7208
105	0.5562	0.5899	0.625

Field of View

Parameter	Limits	Units	Condition
Field of View		Degree	50% of Maximum Output
	51		Min
	56		Typ
	61		Max

Filter Transmission Data

Transmission (%)	Wavelength (um)
0	-2
20	0
40	2
60	4
80	6
100	8

Outline of Sensor Packaging and Pin Arrangement

Unit: mm

Pin arrangement:

1. GND Thermistor
2. Thermopile
3. GND Thermopile
4. Thermistor