| | DHS250 | DHS250M | DHS250H | DHS250HM |
| Description | High Performance Heat Spy | High Performance Heat Spy with Internal Memory | High Temperature, High Performance Heat Spy | High Temperature, High Performance Heat Spy with Internal Memory |
| Temperature Range | -25° to 1652°F
-32° to 900°C | -25° to 1652°F
-32° to 900°C | 302° to 3272°F
150° to 1800°C | 302° to 3272°F 150° to 1800°C |
| Spectral Range | -8 to 14µm | -5.14µm |
| Spectral Range | User switchable °F to °C |
| Emissivity | 0.20 to 1.0 adjustable |
| Accuracy | 1% of reading or 2°F / 1°C whichever is greater, at an ambient temperature of 73°F / 23°C and emissivity of 1.0 |
| Repeatability | 0.5% of reading |
| Temperature Coefficient | 0.03°/°C at 23°C |
| Response Time | 0.15 seconds |
| IR Detector | Thermopile |
| Distance to Target | 50:1 nominal |
| Lens Aperture | 20mm |
| Display Illumination | Automatic in low light |
| Main Display | °F and °C switchable with a 4 digit, 9mm LCD display • Resolution: 0.1° to 999.9°F / 900°C |
| Secondary Display | °F and °C switchable with a 4 digit, 4.5mm LCD display
Resolution: 0.1° from 14° to 392°F (-10° to 200°C) in average mode, 1° in all others |
| Ambient Operating Range | 32° to 131°F (0° to 55°C) (Laser operating range 32° to 122°F) |
| Storage Temperature | -4° to 158°F (-20°C to 70°C) |
| Power Supply / Life | One 9V battery • 50 hours without laser. Laser and backlight operation will reduce battery life. |
| Laser | Laser Class II, IEC825/91, output < 1mW |
| Housing | High impact ABS, UL class VO |
| Tripod Thread | UNC 1/4 inch |
| Enclosure Class | IP20 |
| Dimensions • Weight | see fig 1 • 1 lb (340g) |
| Calculating Mode | MAX, MIN, AVERAGE, MAX ?T, and HOLD |
| Digital Interface | RS232, 9600 Baud |
| Audible Alarm | HI | HI, LOW | HI | HI, LOW |
| Internal Clock | NA | Yes | NA | Yes |
| Analog Output | NA | 1 mV/ °C | NA | 1 mV/ °C |
| Analog Cable | NA | Yes | NA | Yes |
| Data Storage | NA | 250 Values | NA | 250 Values |
| Adjustable Memory | NA | Yes | NA | Yes |
| Software | Optional | Optional | Optional | Yes |
| Included Accessories | All DHS250 Series Instruments are supplied with a foam-lined molded carrying/storage case, wrist strap, and one 9V battery. |