The 12238 has a temperature-buffered sensor enclosed in a bottle of propylene glycol solution, which ensures accurate measurements that are not impacted by rapid temperature fluctuations caused by frequent refrigerator or freezer door openings. The propylene glycol solution is GRAS (generally recognized as safe) and mimics temperature readings in a medium similar to common fluids stored in food and laboratory refrigerators, freezers and cold display cases.
The 12238 Certified Alarm Thermometer comes with a Min/Max memory, a large, easy-to-read LCD, and high/low alarm settings. The thermometer monitors temperature inside freezers, refrigerators, or cold holding display cases. The sensor has a 3 meter cable and a stainless steel, blunt probe enclosed in a sealed plastic bottle of propylene glycol. This enclosure prevents false alarms because the measurements of the probe are not impacted by rapid temperature fluctuations caused by frequent door openings that occur during normal use.
This digital thermometer mimics temperature readings in a medium similar to the common fluids stored in refrigerators and freezers in pharmacies and labs.
| Model | |
|---|---|
| 12238 | Includes Manufacturer's Certificate of Compliance |
| 12238-02 | Includes 2-yr ISO 17025 Calibration Certificate |
| Feature | Specification |
|---|---|
| DeltaTrak manufactures products under an ISO 9001:2015 registered quality management system | |
| External Sensor Measurement Range | -58˚F to 158˚F (-50˚C to 70˚C) |
| Internal Temperature Sensor and Operating Range | 14˚F to 122˚F (-10˚C to 50˚C) |
| Accuracy | ±1.0°F (-22°F to 131°F) ±0.5°C (-30°C to 55°C); otherwise ±1.8°F (±1.0°C) |
| Display Resolution | 0.1°F/°C |
| Display Reading Update | 17 seconds |
| Display Size | 1.92in W x 2.08in L (49mm W x 53mm L) |
| Instrument Size | 2.99in W x 3.74in L x 0.74in D (76mm W x 95mm L x 19mm D) |
| Body Casing | ABS polymer, resistant to chemicals and high impact |
| Sensor | Thermistor |
| External Probe Type/ Size | Stainless Steel, 0.7in L x 0.2in Dia (17.8mm L x 5mm Dia) |
| External Sensor Bottle | 5 mL PETEG Sterile Bottle -21 CFR compliant; Polystyrene with PE cap, 1.6in L x 0.79in Dia (41mm L x 20mm Dia) |
| External Sensor Buffer | Propylene glycol (GRAS classified – Generally Recognized As Safe) |
| Sensor cable | 9.84ft x 0.08in Dia (3 meters x 2mm Dia) |
| Battery | AA Battery, user replaceable |
| Certification/Calibration | 2-yr ISO 17025 Calibration Certificate (A2LA), 1-yr NIST Calibration Certificate, and Manufacturer’s Certificate of Compliance available; CE mark, NIST traceable, RoHS, WEEE |
| Weight | 5.4oz (unit, glycol bottle and sensor) |
Technical Support Forum