Specifications |
Temperature range |
-50°C to 160°C (-58°F to 320°F) |
Accuracy (1 year) |
±0.05°C (±0.09°F) |
Temperature resolution |
Selectable: 0.1, 0.01, 0.001 (default 0.01) |
Sample rate |
Selectable: 0.5 seconds, 1 second, 2 seconds (default 1 second) |
Readout temperature coefficient |
Add ±10 ppm/°C of full scale temperature from −10 °C to 18 °C and 28 °C to 50 °C |
Probe temperature coefficient |
0.00385 Ω/Ω/°C nominal |
Nominal probe resistance at 0 °C |
100 Ω |
Probe hysteresis |
±0.01°C |
Response time |
4.8 mm diameter probe (3/16 in): 14 seconds 6.35 mm diameter probe (1/4 in): 21 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 |
Display units |
°C, °F |
Sensor type |
100 Ω thin-film RTD |
Sensor length |
≤ 10 mm |
Sensor position (from sheath tip) |
3 mm (0.1 in) |
Minimum immersion depth |
Wet medium (liquid bath, thermowell with thermal compound) 70 mm (2.8 in) Dry medium (dry-well, thermowell without thermal compound) 120 mm (4.8 in) |
Maximum immersion depth |
50 mm (2 in) less than the total length. Make sure the last 50 mm of probe, nearest to the internal electronics of the device, are not put into the heat source. |
Probe sheath material |
Stainless steel |
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 |
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 alkaline batteries See Users Manual for approved batteries |
Battery life |
Approximately 300 hours (12.5 days) of continuous operation with the backlight off. |
Battery save (auto-off) range |
Selectable from 1 to 30 minutes or can be disabled |
Safety |
IEC 60079-0, IEC 60079-11: Ex ib IIB T4 Gb; IEC 61010-1: Pollution Degree 2 |
Electromagnetic compatibility |
International: IEC 61326-1: Portable Equipment; IEC 61326-2-2; CISPR 11: Group 1, Class B Group 1: Equipment has intentionally generated and/or uses conductively coupled radio frequency energy that is necessary for the internal function of the equipment itself. Class B: Equipment is suitable for use in domestic establishments and in establishments directly connected to a low voltage power supply network which supplies buildings used for domestic purposes. USA (FCC): 47 CFR 15 subpart B. This product is considered an exempt device per clause 15.103. |
Size (readout only) |
125 mm x 62 mm x 35 mm (5 in x 2.5 in x 1.4 in) |
Probe Size |
1551A-9: 4.8 mm x 229 mm (3/16 in x 9 in) 1551A-12: 6.35 mm x 305 mm (1/4 in x 12 in) 1551A-20: 6.35 mm x 508 mm (1/4 in x 20 in) |
Weight |
196 g (6.9 oz) |
Calibration (included) |
NVLAP-accredited, NIST-traceable |
Characterization |
CVD |
1. See ordering information for optional data logging configurations |