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AMiR 7842 Miniature Infrared Temperature Measuring Heads Type
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Measuring system consisting of a miniature sensor and a separate electronics box within a robust metal housing.
AMiR 7842
Miniature Infrared Temperature Measuring Heads Type

Technical Features:
Measuring system consisting of a miniature sensor and a
separate electronics box within a robust metal housing.
Measuring head with compact dimensions for problem-free
installations, even under restricted space conditions.
Measuring head made from special steel and, therefore,
particularly suitable for continuous operation under severe
conditions.
Due to the outstanding optical characteristics and the short
response time this compact device performs equally good as
high-end systems, which are typically much larger.
Ideal for multiple installations and temperature profile
measurements in production processes.
Economical alternative for contact-based temperature
measurements.

Technical Data
Spectral sensitivity 8 … 14μm
Accuracy: measuring head:
electronics box:
±1% or ±2.5°C, the higher value of either is valid
±0.5% or ±0.5°C, the higher value of either is valid
Reproducibility: 1% of measured value or ±1K
Nominal conditions: 23°C ±5°C
Temperature resolution: ±0.3°C
Response time: 150ms
Emissivity: 0.100 to 1.100 adjustable in electronics box in steps of 0.001
Power supply: 12 to 24VDC / 40mA
Output resistance: for thermocouple output 50Ω
Min. load resistance: for mV output 100kΩ
Max. loop resistance (mA): 500Ω (at 24VDC supply voltage)
Protection system: IP 65 (NEMA 4)
Permiss. ambient temperature: measuring head:
electronics box:
without cooling: 0°C to 85°C, with air cooling: 0°C to 200°
without cooling: 0°C to 65°C
Storage temperature: -18°C to 85°C
Relative humidity: 10 to 95%, non-condensing, at 30°C
Material: measuring head:
electronics box:
special steel
zinc diecasting
Dimensions: measuring head:
electronics box:
L 28 x Ø 14mm, thread M12 x 1
L 80 x W 60 x H 25mm
Weight: measuring head:
electronics box:
50g with 1m cable
270g

Device Functions: 
Max, min value hold function, averaging, variable adjustable up to 998s
Output signals selectable and freely scalable: 0-20mA, 4-20mA, 0-5V (e.g. 4-20mA/0-100°C) / thermocouples K and J
Output signals at thermocouple selection: 10mV/C° (temperature range with thermocouple ´J´: -25 to +600°C)
Limit values max and min, as well as sensor corrections can be set with ALMEMO® devices

Measuring Field:
 

Types (incl. mounting screw, 1m measuring head cable and electronics box):
MR784211D Measuring range -40 to +600°C optical resolution 2 : 1
MR784231D Measuring range -40 to +600°C optical resolution 10 : 1

Options:
OR 7842 VL3 Sensor cable 3m long, fixed mounted
OR 7842 VL15 Sensor cable 15m long, fixed mounted
OR7800KZ1 Factory test certificate, based on DKD/NIST certified sensors (only with delivery of new devices)


Accessories:
ZR7842H Rigid mounting angle
ZR7842JH Adjustable mounting angle
ZR7842LB Air blow attachment
ZR7842SM Mounting adapter for rail mounting (electronics housing)
ZR7842KL1 Air cooling housing and Tee branch incl. 0.8m air hose, insulation and air blow attachment
ZR7842KL2 As above, but with 2.8m air hose
ZR7842SMK Mounting adapter for rail mounting (electronics housing with Tee branch)
ZR7842US 90° deviation mirror (only for air cooling housings or air blow attachment)
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