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Fixed Infrared Temperature Transmitters with a Selection of Field of Views to fit most Industrial Applications


Item# OS151-LT

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 C$422.03
5-9 C$400.93
10-24 C$392.49
25-49 C$375.61
50-99 C$367.17
100+ C$358.73

In stock

Lead Time (If not in stock): 6 weeks
Fixed Infrared Temperature Transmitters with a Selection of Field of Views to fit most Industrial Applications OS151-LT OS151-LT
  • Temperature Range: -20 to 500°C (-4 to 932ºF)
  • Emissivity Setting: Fixed at 0.95
  • 2-Wire 4 to 20 mA Output or 4-Wire Voltage/Thermocouple Output
  • 4-Wire Unit Provides Internal Sensor Temperature

OS151-LT Model Options

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Process Temprature Range
Field of View
Accuracy @ Ambient
Operating Temprature range
Laser Output
Built in Display
Cable Length
Supply Voltage
Spectral Response
Response Time
Communication Protocol
Intrisically Safe

This Series is a range of high quality, low cost, compact sensors which measure the temperature of inaccessible or moving objects and materials. They measure temperatures from -20 to 500°C (-4 to 932ºF), accurately and consistently, with an outstanding response time of 240 ms. Infrared (IR) sensors are available as either 2- or 4-wire units. Twowire IR sensors transmit the target temperature as a 4 to 20 mA output and offer a simple solution for most non-contact temperature measurement applications. Four-wire IR sensors transmit the target temperature as a 0 to 50 mV or thermocouple output (Type J, K or T) plus the internal sensor temperature as a 4 to 20 mA output. This second output can be used to ensure that the sensor is being operated within the correct ambient temperature limits and prevent damage caused by overheating or overcooling. It can also be used to give an approximate indication of the air temperature surrounding the sensor. IR sensors are fitted with precision germanium lenses for accurate optics.

Accuracy: ±1% of reading or ±1ºC whichever is greater
Repeatability: ±0.5% of reading or ±0.5ºC whichever is greater
Emissivity: Fixed at 0.95
Response Time, t90: 240 ms (90% response)
Spectral Range: 8 to 14 µm
Supply Voltage: 24 Vdc (28 Vdc max)
Min Sensor Voltage: 6 Vdc
Max Loop Impedance: 900 O (4 to 20 mA output)
Output Impedance: 56 O (voltage/thermocouple output) Mechanical
Construction: Stainless steel
Dimensions: 103 L x 18 mm D (4.06 x 0.71")
Thread Mounting: M16 x 1 mm pitch
Cable Length: 1 m (3.3') (included) longer lengths available to order
Weight with Cable: 95 g (3.35 oz) Environmental
Rating: IP65
Ambient Temperature Range: 0 to 70ºC (32 to 158ºF)
Relative Humidity: 95% max non-condensing
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Rated 5 out of 5 by from Easy & User Friendly device Bought a 2 wire 4-20mA Temperature sensor, got it with safest packaging possible and timing was also great. Sensor itself is simple and easy plug and play device, no hassles or complications on installation. Great build quality and durability.
Date published: 2016-10-17
Rated 5 out of 5 by from Works great! I bought these sensor in conjunction with some FDC temperature controllers and they work great on the rice parchers they were installed on. We will be purchasing more after season to convert the remaining 16 parchers to no touch temperature monitoring. Very happy with these sensors.
Date published: 2017-08-06
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Where does it show the temperature? Can it be programmed to display the temperature to a TV?

Asked by: Rubs
Thank you for your inquiry. This device does not come with a display. You can choose a display from this link:
Answered by: Application Engineer CB
Date published: 2023-06-12

Hello, For the non-contact temperature with 4-20mA output for the low temperature model (OS301-LT), is there an online reference curve/values showing signal to temperature values? Thank you

Asked by: antoinelk
Thank you for your inquiry. The 4-20mA signal has a linear relationship with the temperature range on the sensor.
Answered by: NorwalkAE_SP
Date published: 2024-05-29

I saw in the documentation that it could "be ordered with a longer cable attached." What other lengths are available?

Asked by: Ransackum
Thank you for your interest in our product. We can offer up to 30 meters (98 feet) maximum total cable length. Please email the product model number along with the cable length requirement to for pricing and lead time.
Answered by: SAT_SAE
Date published: 2023-01-03

We looking for ice temperature sensor. (OS-301-LT) The sensor should be installed at 20 feet from the target. With 30:1 ratio the spot size is still good. Does it can read up to 20 feet away?

Asked by: Chose
Thank you for your inquiry. Yes this device can read 240 inches away.
Answered by: Application Engineer CB
Date published: 2023-12-28

I'm looking for a non contact temperature sensor that can read up to 10feet away. It also has to read clear liquid. Do you offer a sensor that would work? It needs to be outdoor rated.

Asked by: sfrendle
Thank you for your inquiry sfrendle. Unfortunately, we do not offer a non contact temperature that can measure the temperature of a liquid. Our sensors can only measure the temperatures of solids.
Answered by: Application Engineer MC
Date published: 2022-08-05
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