ULTRA-WEB® Cartridge Filter Clean the Air Better, Last Longer - Patented merv 13 rated Ultra-Web Filters lower emissions and last up to 2X longer (read more)

AERO Cell filters have been engineered to provide medium to high efficiency filtration combined with prolonged life cycles. By nature of its completely rigid design, the AERO Cell eliminates the need for retainers and special external wire media supports.

UL Class 1 and 2. Average efficiency range 50-95% (read more)

The 6187 Series is a high pressure gas filter that employs a fine cloth filter media of microporous fiberglass supported between a wire mesh disc and high pressure rated screen. The unit is constructed of all welded 316 stainless steel housing to provide maximum purity. (read more)

"All-welded" Models 6124, 6134 and 6164 Stainless Steel High Purity Depth Filters from Matheson Tri-Gas.

Matheson Tri-Gas depth filters utilize a fiberglass media and are rated to 250 psig service. They are 100% efficient at a 0.2 micron level. They feature an all welded stainless steel housing and are available in a wide selection of pipe, tubing and VCR connections. (read more)

The KH Model 3955 programmable, dual channel, low-pass filter is the first dual low-pass programmable filter of its kind, covering the wide cutoff frequency range from 170Hz to 25.6MHz with 2 digits of resolution. The 3955 is a 4-pole, maximally flat (Butterworth) filter, with an attenuation slope of 24dB/octave and a stopband attenuation of >100dB referred to 1Vrms input. (read more)

The KH Model 3940 programmable, dual channel, Butterworth/Bessel filter is a GPIB/benchtop filter covering a cutoff frequency range from 3Hz to 2MHz. Attenuation slope is 24dB/octave per channel. The 3940 will accept input levels of ±4.5V peak. Pre and post-filter gains of 0dB or 20dB is also provided. All functions are front panel or GPIB bus controlled. (read more)

KRF Series 3-Phase EMI RFI Power Line Filters (read more)

The KH Model 3945 programmable filter provides one Butterworth channel of low-pass, tunable over the range from 170Hz to 25.6MHz; and two independent Butterworth or Bessel channels of low-pass, high-pass or bypass, one channel of band-pass or band-reject, tunable over the range from 3Hz to 2MHz. (read more)

The KH Model 3988 provides a tunable frequency range from 0.03Hz to 1MHz in the low-pass mode and 0.03Hz to 300kHz in the high-pass mode. Both low end frequency cutoff is 0.003Hz with the 002 option. Each channel of the 3988 is an 8-pole, wide range, low-pass/high-pass filter or an amplifier providing gains to 70dB in 0.1dB steps. (read more)

The KH Model 3944 is a 4-channel, Butterworth/Bessel filter providing GPIB/benchtop filtering covering a cutoff frequency range from 3Hz to 2MHz. Passband gain is unity, and the attenuation slope is 24dB/octave per channel. The 3944 will accept input signals of ±4.5V peak providing input and output gains of 0dB or 20dB selectable via the front panel keyboard or the GPIB bus. (read more)