Digital Planimeters
Click on item to see a larger image

Our digital planimeters all feature an LCD 8-digit display and ±0.2% accuracy (within ± 2/1,000 pulses). Maximum accumulated measuring value is 10m2 (scale 1:1). Comes with AC adapter and plastic case.

Power supply consists of a built-in rechargeable Ni-Cad storage battery, rechargeable through AC adapter. 15 hour charge time provides approximately 30 hours of continuous operation; or choose AC 100V, 120V, 220V, or 240V using the supplied AC adapter with automatic power-off function.

Polar Type Planimeter

10 symbol display includes: Batt-E, SCALE, MEMO, HOLD, cm2, m2, km2, in2, ft2, acre; unit and scale value converting function. Measuring range: maximum with the pole placed outside the pattern, 300Ø; maximum with the pole placed inside the pattern, 800Ø. Main unit weighs 780g.

Pencil Magnet
Click on item to see a larger image

Designed in the shape of a pencil with pocket clip and small magnet at tip. A spring wire clip is located at the middle. When the “pencil” is held by this wire clip, the “pencil” pivots on this centerholder when the magnet at the tip is attracted to magnetic minerals present in a rock specimen brought in its proximity. Length 4-3/4 inches.

Digital Dissolved Oxygen Meter • Model DO-4000
Click on item to see a larger image

Portable hand-held dissolved oxygen meter designed to provide measurements for the most critical water quality parameter. Digital readout provides mg/L, % saturation, and temperature readings by selecting a mode. Features automatic temperature compensation (ATC) for mg/L and % saturation; salinity compensation is manual by direct dial. Meter comes packaged in a convenient carrying case with 2 replacement membrane cartridges, electrolyte, and protective probe storage bottle.

Features:

Range:0-19.99 mg/L; 0-200% Sat.,Resolution:0.01 mg/L; 1% Sat.,Compensation:Automatic temperature compensation (ATC) for mg/L and % saturation. Manual setting for salinity 0-30 ppt in 5 ppt increments.Probe:Polarographic type, Delrin® body, 2 mil Teflon® membrane, 3m (10 ft) or 15m (50 ft) cable with connector.Readout3-1/2 digit LCDControls:O2 , % Sat, °C, Off, Salinity Comp, SlopeResponse Time:90% in 10 seconds at a constant temperature of 21°C. Response at low dissolved oxygen levels typically 90% in 30 secondsPower:Alkaline 9V DC battery, 3.5 mm jack for optional AC adapter.