This kit came to us complete as surplus from a public health authority. It appears operational and to have accurate and responsive readings. There is no indication as to when it was last calibrated. Calibration is recommended annually, so it should be anticipated this will be required.
*CO2
Sensor type Non-Dispersive Infrared (NDIR)
Range 0-5000 ppm
Accuracy ±3% of reading ±50 ppm at 25°C (77°F). (add uncertainty of ±0.36% per °C (±0.2% of reading per °F) for change in temperature)
Resolution 1 ppm
Response time 20 seconds (for 63% of final value For 500 ppm step change)
*TEMPERATURE
Sensor type Thermistor
Range 0 to 50°C (32 to 122°F)
Accuracy ±0.6°C (1.0°F)
Resolution 0.1°C (0.1°F)
Response time 120 seconds (for 63% of final value)
Display units °C or °F (user selectable)
*HUMIDITY
Sensor type Thin-film capacitive
Range 5 to 95%rh
Accuracy ±3%rh (Includes ±1% hysteresis.)
Resolution 0.1%rh
Response time 20 seconds (for 63% of final value)
*CO
Sensor type Electro-chemical
Range 0-500 ppm
Accuracy ±3% of reading or 3 ppm whichever is greater (add ±0.5%/°C (0.28%/°F) away from calibration temperature)
Resolution 1 ppm
Repeatability ±2% of reading
Response time <60 seconds to 90% of final value
*INSTRUMENT TEMPERATURE RANGE
Operating range 5 to 45°C (41 to 113°F)
Storage range -20 to 60°C (-4 to 140°F)
*TIME CONSTANT
Range Adjustable from 2 to 60 seconds
*DATA LOGGING
Data points 63,000 (14 days of logging simultaneous CO2, Temperature, and Humidity at 1-minute intervals)
Logging interval User adjustable from 1 second to 1 hour
*POWER REQUIREMENTS
Batteries Four AA-size Alkaline or NiCd
AC adapter 6 VDC nominal, 300 ma, (Q-TRAK mates with 5.5 mm OD x 2.1 mm ID plug, center pin positive(+))
Approx. battery Life 13.5 hours (Alkaline), 4.75 hours (NiCd)
*PHYSICAL
External dimensions 107 mm x 183 mm x 38 mm
(4.2 in x 7.2 in x 1.5 in)
Probe length Model 8551: 16.5 cm (6.5 in)
Probe diameter 1.9 cm (0.75 in)
Weight 0.59 kg (1.3 pounds)(with batteries)
Display 4-digit LCD, 15 mm (0.6 in) digit Height
*MAINTENNCE SCHEDULE
Factory calibration Annually
*SERIAL INTERFACE
Type RS-232
BAUD rate 1200
Data bits 8
Stop bits 1
Handshaking None
Data format ASCII
Return Policy
7 Day Return Policy. Customer must pay the return shipping costs when returning a product. If you find the item is not as described in the ad it may be returned for a purchase price refund. Generally, all of our items have an inspection warranty which kicks in upon delivery for a period of 7 to 14 days. It is not an operational warranty as most items sold on DOTmed require biomedical certification before use. If you require additional coverage please contact us prior to purchase.
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