Specifications

1551A Ex

1552A Ex

Temperature range

-50 °C to 160 °C 
(-58 °F to 320 °F)

-80 °C to 300 °C 
( -112 °F to 572 °F)

Accuracy (1 year)

± 0.05 °C (± 0.09 °F)

Display units

°C, °F

Sensor type

100 Ω thin-film RTD

100 Ω wire-wound PRT

Probe temperature coefficient

0.00385 Ω/Ω/°C nominal

Sensor length

≤ 10 mm

≤ 30 mm

Sensor position (from sheath tip)

3 mm (0.1 in)

Minimum immersion depth

7 cm (2.8 in)

12 cm (4.8 in)

Probe sheath material

Stainless steel

Response time

4.8 mm diameter probe (3/16 in): 14 seconds 
6.35 mm diameter probe (1/4 in): 21 seconds

Probe hysteresis

± 0.01 °C

Temperature resolution

Selectable: 0.1, 0.01, 0.001 (default 0.01)

Sample rate

Selectable: 0.5 seconds, 1 seconds, 2 seconds (default 1 seconds)

Operating temperature range readout

-10 °C to 50 °C (14 °F to 122 °F)

Temperature resolution

Selectable: 0.1, 0.01, 0.001 (default 0.01)

Sample rate

Selectable: 0.5 seconds, 1 seconds, 2 seconds (default 1 seconds)

Operating temperature range readout

-10 °C to 50 °C (14 °F to 122 °F)

Storage temperature

-20 °C to 60 °C (-4 °F to 140 °F) 0 % to 95 % RH, non-condensing

Optional data logging¹

Up to 10,000 time-stamped readings stored to internal memory

Logging intervals¹

2 seconds, 5 seconds, 10 seconds, 30 seconds, or 60 seconds; 
2 minutes, 5 minutes, 10 minutes, 30 minutes, or 60 minutes

Damping

Moving average of the most recent 2 to 10 readings 
(ON/OFF, 2, 5, 10)

Communications

RS-232 stereo jack (access calibration parameters only)

AC power

None

DC power

3-AAA Batteries, typical battery life of 300 hours without LCD backlight

EMC compliance

EN61326:2006 Annex C; CISPR II Edition 5.0-2009; Class “B

Enclosure rating

IP50

Electronics dimensions (H x W x D)

114 mm x 57 mm x 25 mm 
(4.5 in x 2.25 in x 1.0 in)

Weight

196 g (6.9 oz)

Calibration (included)

NVLAP-accredited, NIST-traceable

Characterization

CVD

ITS-90