Grab

Since 1930 the Petersen grab has been used in fresh water for collecting macroscopic fauna in sand, gravel, marl, clay or clay combinations.

If used in salt water, it must be painted for protection. Since it has been widely used over 6 decades, it is ideal for comparing samples with data collected previously by a Petersen grab. Vent holes permit water to flow through while the grab is being lowered, minimizing diagonal movement as well as reducing the frontal shock wave generated by descent. Jaws close clamshell fashion.

We include a safety-pin to prevent the scoops from closing to help prevent injury. The bayonet-style trip mechanism is designed to release only when the sampler is on the bottom and the cable is slack. A deliberately heavy device for biting deep into hard bottoms. Can hold up to 8 removable weights. Operation requires winch and crane due to the working weight. Ship wt: 115 lbs.
 

Features

• Classic fresh water sampler in hard bottoms
• Zinc plated to prevent corrosion
• Hot rolled steel and cast iron construction
• Large volume, large sampling area
• Tapered scoop edges
• Safety pin lock
• Clamshell pivot

Specifications

Catalog Number	Ekman, Standard 196-B12 Kit	Ekman, Tall 196-F62 Kit	Ekman, Large 197-C12 Kit	Ponar®, Petite 1728-G30	Ponar®, Standard 1725-F10
Box Size (footprint)	15 x 15 x 15 cm (6 x 6 x 6”)	15 x 15 x 23 cm (6 x 6 x 9”)	23 x 23 x 23 cm (9 x 9 x 9”)	15 x 15 cm (6 x 6”)	23 x 23 cm (9 x 9”)
Bite depth	152 mm (6”)	229 mm (9”)	229 mm (9”)	70 mm (2.75”)	89 mm (3.5”)
Screen mesh	none	none	none	500 μm	500 μm
Dry Weight	3 kg (7 lbs)	5 kg (11 lbs)	7 kg (15 lbs)	11 kg (24 lbs)	23 kg (50 lbs)
Weight with sample	16 kg (35 lbs)	21 kg (46 lbs)	38 kg (83 lbs)	14 kg (30 lbs)	34 kg (75 lbs)
Extra weights	3 kg (7 lbs)	3 kg (7 lbs)	none	4 kg (8 lbs)	4 kg (8 lbs)
Ship weight	7 kg (15 lbs)	8 kg (18 lbs)	15 kg (33 lbs)	11 kg (24 lbs)	23 kg (50 lbs)
Volume of Scoops	3.5 liter (214 in3)	5.3 liter (323 in3)	11.9 liter (726 in3)	2.4 liter (145 in3)	8.2 liter (500 in3)
Sample area	232 cm2 (36 in2)	232 cm2 (36 in2)	522 cm2 (81 in2)	232 cm2 (36 in2)	522 cm2 (81 in2)
Length and width overall	24 x 22 cm (9.5 x 8.5")	24 x 22 cm (9.5 x 8.5")	35.5 x 33 cm (14 x 13")	41 x 29 cm (16 x 11.5")	55 x 25 cm (21.5 x 10")
Accessories needed	62-C15 poly line 66-A50 reel	62-C15 poly line 66-A50 reel	62-C15 poly line 66-A50 reel	61-B14 cable 66-C10 winch or 62-C15 poly line	61-B14 cable 66-C10 winch 66-C52 mount

Specifications

Catalog Number	Shipek® Grab 860-A10	Petersen 1750-G30	Van Veen 1775-A10	Box Corer 191-A12
Box Size (footprint)	20 x 20 cm (7.8 x 7.8")	30 x 30 cm (12 x 12")	36 x 28 cm (14 x 11")	15 x 15 x 23 cm (6 x 6 x 9")
Bite depth	102 mm (4")	140 mm (5.5")	114 mm (4.5")	229 mm (9")
Screen mesh	none	none	500 mm (23")	500 mm (23")
Dry Weight	61 kg (134 lbs)	34 kg (75 lbs)	21 kg (46 lbs)	14 kg (31 lbs)
Weight with sample	69 kg (152 lbs)	61 kg (135 lbs)	68-90 kg (150-200 lbs)	50 kg (110 lbs)
Extra weights	none	8 kg (18 lbs)	none	49 kg (108 lbs)
Ship weight	91 kg (220 lbs)	50 kg (160 lbs)	41 kg (90 lbs)	42 kg (93 lbs)
Volume of Scoops	3 liter (183 in3)	9.9 liter (604 in3)	24 liter (1465 in3)	5.3 liter (323 in3)
Sample area	400 cm2 (62 in2)	928 cm2 (144 in2)	993 cm2 (154 in2)	232 cm2 (36 in2)
Length and width overall	56 x 109 cm (22 x 43")	65.4 x 33 cm (25.75 x 13")	56 x 38 cm (22 x 15")	35.5 x 24 cm (14 x 9.5")
Accessories needed	61-B14 cable 81-A10 crane	61-B14 cable 81-A10 crane	61-B14 cable 85-E10 winch	61-B14 cable 81-A10 crane