OMRON ES1B-140-260C — Spot Temperature Sensors
Omron ES1B-140-260C: infrared thermosensor, 140 to 260 °C, K-type thermocouple equivalent output, 12/24 V DC, M18 housing, IP65.
Status: In production
Brand: Omron
Product: Infrared thermosensor, 140 to 260 °C
Measuring range: 140 to 260 °C
Output: K-type thermocouple equivalent
Power supply: 12/24 V DC
Response speed: Approx. 300 ms (63%)
Degree of protection: IP65
ES1B-140-260C is the model with the highest measuring range in the Omron ES1B family: it measures object temperatures from 140 to 260 °C without contact. Its output is equivalent to a K-type thermocouple and, with an output impedance of 1 to 4 kΩ, it connects to the thermocouple input of a temperature controller. According to the installation notes, a shield should be used when measuring a high-temperature object to prevent the sensor from heating up. The input shift example in the datasheet is also described for this 140 to 260 °C model.
The thermopile receiver works in the 6.5 to 14.0 µm wavelength band; the sensing distance to diameter ratio is 1:1 typ. and response speed is approx. 300 ms (63%). Within ±40 °C of the reference, accuracy is ±8% of process value or ±8 °C; temperature drift is 0.4 °C/°C max. The supply is 12/24 V DC and current consumption is 20 mA max. The M18 ABS housing is rated IP65; the 3 m compensating-conductor cable is 4-wire with open ends.
Omron ES1B-140-260C technical specifications
| General | |
|---|---|
| Product type | Infrared thermosensor, non-contact temperature measurement |
| Receiver element | Thermopile |
| Housing | M18 threaded cylindrical housing, screw M18×1.0 |
| Detection | |
| Measuring temperature range | 140 to 260 °C |
| Accuracy, within ±5 °C of reference | ±2% of process value or ±2 °C, whichever is larger |
| Accuracy, within ±10 °C of reference | ±4% of process value or ±4 °C, whichever is larger |
| Accuracy, within ±30 °C of reference | ±6% of process value or ±6 °C, whichever is larger |
| Accuracy, within ±40 °C of reference | ±8% of process value or ±8 °C, whichever is larger; based on K-type thermocouple characteristics and an emissivity of 0.9 |
| Reproducibility | ±1% of process value or ±1 °C, whichever is larger |
| Temperature drift | 0.4 °C/°C max. |
| Sensing distance vs. sensing diameter | 1:1 typ.; e.g. 20 mm diameter at 20 mm distance |
| Measurement wavelength | 6.5 to 14.0 µm |
| Response speed | Approx. 300 ms at 63% response |
| Electrical characteristics | |
| Power supply voltage | 12/24 V DC |
| Operating voltage range | 90% to 110% of the power supply voltage |
| Current consumption | 20 mA max. |
| Outputs and indicators | |
| Output | Electromotive force equivalent to a K-type thermocouple (mV); connects directly to the thermocouple input of a temperature controller |
| Output impedance | 1 to 4 kΩ |
| Connection method | 4-wire: green output +, white output −, orange power +, shield power − |
| Isolation | Thermocouple output and power supply are not isolated |
| Environmental | |
| Operating temperature | −25 °C to 70 °C (with no icing or condensation) |
| Allowable ambient humidity | 35% to 85% |
| Vibration resistance (destruction) | 98 m/s² for 2 hours each in X, Y and Z directions at 10 to 55 Hz |
| Shock resistance (destruction) | 300 m/s² 3 times each in X, Y and Z directions |
| Degree of protection | IP65 |
| Mechanical and connection | |
| Casing material | ABS resin |
| Tube length | 44.5 mm |
| Cable | 3 m compensating conductor, PVC-covered cable with shield wire resisting 70 °C, open ends |
| Mounting | 2 mounting lock nuts provided; tightening torque 0.5 N·m max. |
| Weight | Approx. 120 g |
Key features
- 140 to 260 °C measuring range, the highest in the family
- K-type thermocouple equivalent output, 1 to 4 kΩ output impedance
- Sensing distance to diameter ratio 1:1 typ.
- Temperature drift 0.4 °C/°C max.
- 12/24 V DC, 20 mA max., IP65
ES1B-140-260C ordering codes
| Part number | Description |
|---|---|
| ES1B 140-260C | Measuring range 140 to 260 °C |
| ES1B 60-120C | Measuring range 60 to 120 °C |
Other Omron Spot Temperature Sensors
- OMRON ES1B-60-120C — Infrared thermosensor, 60 to 120 °C
- OMRON ES1C-A40 — Infrared thermosensor, 0 to 400 °C, 4 to 20 mA output
Models from other brands: Spot Temperature Sensors
Is this non-contact temperature sensor right for your application?
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All product specifications are subject to change without notice. Source: Omron, product pages https://industrial.omron.eu/en/products/ES1B-140-260C and https://industrial.omron.eu/en/products/es1b; ES1B datasheet, Cat. No. H127-E1-01 (https://files.omron.eu/downloads/latest/datasheet/en/h127_es1b_infrared_thermosensor_datasheet_en.pdf); ES1B leaflet (https://files.omron.eu/downloads/latest/brochure/en/es1b_leaflet_en.pdf) (accessed 28 September 2026).