HHF-SD2-Meter

Supported Applications

The HHF-SD2 is a combination vane anemometer and thermistor thermometer with a built-in real-time SD card data logger. It measures air velocity and air temperature at the same time through a vane probe, and accepts a Type K thermocouple input for additional surface or immersion temperature measurement. Logged data is written directly to an SD memory card as Excel-compatible (.xls) files.

A backlit LCD, automatic temperature compensation, and multiple selectable velocity units make the HHF-SD2 a strong fit for air conditioning and heating systems, ventilation balancing, duct and grille airflow surveys, and general environmental air-movement testing. An optional RS232/USB interface with software lets logs be transferred to a PC for analysis.

The meter comes complete with a vane probe, a hard carrying case, a 2 GB SD card, and a free 1 m (40") Type K insulated beaded-wire thermocouple with subminiature connector and wire spool caddy. It is not designed for and should not be used in human applications.

Operating Conditions & Performance

Air velocity is measured from 0.4 to 25.0 m/s — equivalent to 1.4 to 90.0 km/h, 0.9 to 55.9 mph, 0.8 to 45.6 knot, or 70 to 4921 ft/min — with an accuracy of ±(2% + 0.2 m/s) and a resolution of 0.1 m/s (1 ft/min). Air temperature is reported at 0.1°C (0.1°F) resolution. The vane probe measures 72 mm dia (2.83").

Data-logging and interface behavior includes:

• Sampling time (Auto): 1 to 3600 seconds, with the display updating at 1 second
• Memory: SD memory card storing Excel-compatible logs
• Interface: RS232 and USB (each with optional cable and software)
• Display: 52 x 38 mm (2.05 x 1.50") LCD with switchable green backlight

The unit runs on 6 "AAA" alkaline or heavy-duty batteries (included) or an optional 9V power adaptor, drawing 15 mA DC without the SD card or backlight and 36 mA with all functions active. It operates from 0 to 50°C (32 to 122°F) at less than 85% RH, weighs 515 g (1.13 lb), and measures 203 L x 76 W x 38 mm D (8 x 3 x 1.50"). The instrument is manufactured to ISO 9001 quality standards.

Configuration Options

Offered as a single model, the HHF-SD2's versatility comes from its selectable measurement scales and its thermocouple input. Velocity can be displayed in m/s, km/h, ft/min, knots, or mile/hr, and temperature reads in °C or °F with automatic temperature compensation.

When a thermocouple is fitted (sold separately), the measuring capability depends on the sensor type. A Type K sensor covers -50 to 1300°C (-58 to 2372°F), while a Type J sensor covers -50 to 1200°C (-58 to 2192°F); both provide 0.1°C resolution and ±(0.4% + 0.5°C) accuracy over their main spans, easing to ±(0.4% + 1°C) at the coldest sub-range.

Key Product Differences

The series consists of one meter supported by a set of interface and replacement accessories:

• HHF-SD2 — Data-logging vane anemometer with SD card
• SW-U101-WIN — Software for data logging from meters, with USB and RS232 cables
• HC-SD — Replacement hard carrying case
• SC-SD — Soft carrying case
• ADAPTER-SD — AC adaptor
• USB-SD — Spare USB cable (SW-U101-WIN software required)
• RS232-SD — Spare RS232 cable (SW-U101-WIN software required)
• 2GB-SD — Spare 2 GB SD memory card

Type K and Type J thermocouples are ordered separately to match the temperature task, and a spare beaded-wire thermocouple is available as model SC-GG-K-30-36.