| Part Number | Alternate P/N | Kit | NIST Certification | Price | |
|---|
| RH300 | RH300 | Without Psychrometer Kit | Without NIST Calibration Certificate | $99.99 | |
| RH300-NIST | RH300NIST | Without Psychrometer Kit | With NIST Calibration Certificate (7 to 10 day lead time) | $220.99 | |
| RH305 | RH305 | With Psychrometer Kit (temperature probe, calibration bottles & case) | Without NIST Calibration Certificate | $149.99 | |
| RH305-NIST | RH305NIST | With Psychrometer Kit (temperature probe, calibration bottles & case) | With NIST Calibration Certificate (7 to 10 day lead time) | $274.99 | |
Return to the Extech RH300 Hygro-Thermometer Psychrometer