Product Focus - Pulse Conditioner

MODEL JH2376

PULSE CONDITIONER

Full-featured Model JH2376 is the "big brother" to our low-cost JH376/JH377 pulse amplifier & converter (blog posting Oct 10, 2009). Fully isolated and capable of handling voltages from 20mV to 250Vrms (700V peak-to-peak) it serves applications ranging from tachometers and flow turbines to power and VFD (variable frequency drive) frequency monitoring. The input is safely isolated and converted to a 5V logic pulse output.

Adjustable sensitivity and optional filtering allow the user to tailor the unit for each application, optimizing sensitivity and frequency response versus noise rejection. DIN-rail mounted, the JH2376 is available with 115 and 230Vac power options.

Here's a link to the spec sheet: JH2376 Pulse Conditioner

Our previously-announced pulse conditioners are:

• Model JH376 Pulse Amplifier. Millivolt inputs, dual channel, low cost, nonisolated.
• Model JH377 Pulse Converter. Converts 5V logic to open-collector and vice versa. Dual channel, low cost, nonisolated.

We also make:

• DC to Frequency Converters (Integrators: Models JH7500 & JH7501. JH7500, 5V logic pulse or open-collector output. JH7501, relay contact output, low pulse rates only. Plug-in style.
• Model JH7010I Frequency to DC Converter (Frequency Input Transmitter). Plug-in style, fixed range.
• Model JH7580 Frequency to DC Converter (Frequency Input Transmitter). Plug-in style, user-rangeable.
• Model JH5700 Frequency to DC Converter (Frequency Input Transmitter). DIN-rail mount, fixed range.
• Model JH1700 & JH1720 Frequency Input Alarm Trips. Plug-in style, fixed range. JH1700, single trip. JH1720, dual trip.

Signal Conditioners (our web site): http://www.jhtechnology.com/

Speaking of Specials - - -

Pulse Amplifier:
Special Product - leads to a second special - then two standard products - and then yet a third special!

A bit of "fun" history here - our standard Models JH376 & JH377 were introduced  last year (blog entry October 10, 2009).

In 2001 an engineer at a Canadian company - lets call it "Company A" - contacted us. They were using another manufacturer's pulse amplifier which worked but was inconvenient to mount in their system. We quoted, designed and sold them a functional equivalent in a DIN-rail mount case. The engineer later left and the orders stopped.

The same engineer called us in 2004, now with a different firm ("Company B") and with a modified set of requirements. He needed different - and adjustable - sensitivity, different filtering and the ability to accommodate both mag pickup and logic pulse inputs. We worked with him to prototype and develop a new design. They ordered regularly for about two years but then, early 2007, the orders stopped. (We later learned he'd gone back to "Company A".)

So - we now had a design but no customers. We decided to "run it up the flagpole" as a standard product and see what happened. After reviewing both companies' requirements plus competitive products we revised the standard product's filtering and sensitivity specs a bit. Introduced a year ago, it's been a modest success including a new OEM customer.

And now. "the rest of the story". In August "Company B" called again. They reordered their version but really wanted yet a different set of requirements. We again worked with them to develop a new version which they have since bought. We also contacted the original engineer at "Company A" but their systems have changed and they no longer need pulse amplifiers.

Our standard products (with links):
Pulse Amplifier: Model JH376, optimized for use with mag-coil type magnetic pickups.
Pulse Converter: Model JH377, optimized for use with logic pulse and open-collector inputs.
Or, if you need specials, contact us - jhtek@jhtechnology, (800) 808-0300 or (941) 927-0300,

Our web site: http://www.jhtechnology.com/

New Product - Pulse Amplifiers

New Product

Announcement -

Low-Cost

Pulse Amplifiers

We've added two new pulse amplifiers to our product line.

For tachometers, turbine flowmeters and other magnetic coil pickups: Model JH376.

Two channels in one 0.7 in wide case. Each output is jumper-selectable, either 5V pulses or open collector. Highly sensitive, but includes sensitivity adjustments to optimize performance in noisy environments.

To convert logic pulses: Model JH377.

Inputs are jumper-selectable, either 5V/TTL or open-collector/contact closure. Outputs are jumper-selectable, either 5V pulses or open-collector. Again, two channels in one case.

Both products operate from 7 to 24Vdc power and at temperatures from -40 to +80 degrees C (-40 to 176 deg. F).

Links: Pulse Amplifiers and related products
All JH Technology Signal Conditioners