Altek 941 frequency calibrator – no longer in production!
The Altek 941 was designed back in 1995 and was last manufactured in 1999. The PIE 541 matches the Altek in fit, form and function with a few features bringing the design into the 21st century. Instead of the six “AA” batteries in the Altek the PIE uses a single 9V battery. The PIE has the same resolution and accuracy as the Altek with longer battery life letting you calibrate more instruments between battery changes. They both have ranges with high resolution in Hz and kHz as well as ranges for CPM (Counts-Per-Minute) and CPH (Counts-Per-Hour). A built-in BNC connector is available when the PIE 541-BNC is ordered. The PIE 541 also adds features to calibrate totalizers.
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Advantages of the PIE 541 Frequency Calibrator over the Altek 941 Frequency Calibrator
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- Easier to set up
Easy push button menu instead of turning the calibrator off and back on to change settings - Simpler and easier battery changes
Single 9V battery vs. 6 AA batteries. Auto off feature saves battery life - Smaller & lighter
Pocket sized and easier to carry - Calibrate optical pickups
LED flashes in sync with frequency output. LED also flashes in sync with reading for fast adjustment of trigger level. - Calibrate totalizers
Output a set number of pulses in a set period of time to quickly calibrate totalizers without a stopwatch
- Easier to set up
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 Discontinued Altek 941 or 942 Recommended Replacement PIE 541 |  Recommended Replacement PIE 541 |
Why choose a PIE 541 instead of some other brand of frequency calibrator? Like the Altek, the PIE 541 works with many different types of frequency instruments. We are the same team that designed the Altek 40, 40A, 241, 941 and 942 frequency calibrators and no other manufacturer has as much frequency calibrator experience as PIE. PIE also manufactures a complete line of milliamp, voltage, thermocouple, and RTD single function calibrators as well as multifunction calibrators matching and surpassing the Altek line of handheld calibrators.
When it is time for service on your Altek 941 PIE has the most experience in calibration and repair of Altek electronic calibrators. Or, if it is time to upgrade or replace a failing Altek 941 calibrator, we offer a discount on a new PIE calibrator similar to the Altek that you are replacing – in working or non working condition! Click for repair and calibration pricing.
Replacing a different Altek Calibrator? Click Altek Calibrator Replacements or download the complete Altek Calibrator Replacement Guide